diff --git a/apps/web/src/App.tsx b/apps/web/src/App.tsx
index d301e276..f9f6bff7 100644
--- a/apps/web/src/App.tsx
+++ b/apps/web/src/App.tsx
@@ -4,6 +4,7 @@ import { BrowserRouter, Navigate, Route, Routes, useLocation } from "react-route
 import { Toaster, toast } from "sonner";
 import { ConnectionMonitor } from "./components/common/connection-monitor";
 import { KeyboardShortcutProvider } from "./components/common/keyboard-shortcut-provider";
+import { RouteAnnouncer } from "./components/common/route-announcer";
 import { I18nProvider } from "./contexts/i18n-context";
 import { useAuth } from "./hooks/use-auth";
 import { useMobile } from "./hooks/use-mobile";
@@ -221,6 +222,13 @@ export function App() {
         <ConnectionMonitor />
         <Toaster position={isMobile ? "top-center" : "bottom-right"} />
         <BrowserRouter>
+          <a
+            href="#main-content"
+            className="sr-only focus:not-sr-only focus:fixed focus:top-4 focus:left-4 focus:z-[100] focus:px-4 focus:py-2 focus:bg-primary focus:text-primary-foreground focus:rounded-lg focus:text-sm focus:font-medium focus:shadow-lg"
+          >
+            {en.a11y.skipToContent}
+          </a>
+          <RouteAnnouncer />
           <KeyboardShortcutProvider>
             <AuthGuard>
               <Suspense fallback={<PageLoader />}>
diff --git a/apps/web/src/components/common/before-after-slider.tsx b/apps/web/src/components/common/before-after-slider.tsx
index 61ae9c11..07ace22c 100644
--- a/apps/web/src/components/common/before-after-slider.tsx
+++ b/apps/web/src/components/common/before-after-slider.tsx
@@ -134,7 +134,7 @@ export function BeforeAfterSlider({
       <div
         ref={containerRef}
         role="slider"
-        aria-label="Before/after comparison slider"
+        aria-label={t.a11y.beforeAfterSlider}
         aria-valuenow={Math.round(position)}
         aria-valuemin={0}
         aria-valuemax={100}
diff --git a/apps/web/src/components/common/bottom-sheet.tsx b/apps/web/src/components/common/bottom-sheet.tsx
index beff292a..1e92dcd5 100644
--- a/apps/web/src/components/common/bottom-sheet.tsx
+++ b/apps/web/src/components/common/bottom-sheet.tsx
@@ -1,6 +1,8 @@
 import { useDrag } from "@use-gesture/react";
 import { X } from "lucide-react";
 import { useCallback, useEffect, useRef, useState } from "react";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useFocusTrap } from "@/hooks/use-focus-trap";
 
 interface BottomSheetProps {
   open: boolean;
@@ -17,7 +19,9 @@ export function BottomSheet({
   children,
   maxHeight = "70dvh",
 }: BottomSheetProps) {
+  const { t } = useTranslation();
   const sheetRef = useRef<HTMLDivElement>(null);
+  useFocusTrap(sheetRef, open);
   const [translateY, setTranslateY] = useState(0);
 
   // Close on Escape key
@@ -74,6 +78,9 @@ export function BottomSheet({
       {/* Sheet */}
       <div
         ref={sheetRef}
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby={title ? "bottom-sheet-title" : undefined}
         className="fixed inset-x-0 bottom-0 z-50 bg-background border-t border-border rounded-t-2xl shadow-xl flex flex-col animate-in slide-in-from-bottom"
         style={{
           maxHeight,
@@ -89,11 +96,14 @@ export function BottomSheet({
         {/* Header */}
         {title && (
           <div className="flex items-center justify-between px-4 pb-2 shrink-0">
-            <h2 className="text-sm font-semibold text-foreground">{title}</h2>
+            <h2 id="bottom-sheet-title" className="text-sm font-semibold text-foreground">
+              {title}
+            </h2>
             <button
               type="button"
               onClick={handleDismiss}
               className="p-1.5 rounded-lg hover:bg-muted text-muted-foreground hover:text-foreground transition-colors"
+              aria-label={t.common.close}
             >
               <X className="h-4 w-4" />
             </button>
diff --git a/apps/web/src/components/common/dropzone.tsx b/apps/web/src/components/common/dropzone.tsx
index ff114776..e20d8e4a 100644
--- a/apps/web/src/components/common/dropzone.tsx
+++ b/apps/web/src/components/common/dropzone.tsx
@@ -205,7 +205,7 @@ export function Dropzone({
 
   return (
     <section
-      aria-label="File drop zone"
+      aria-label={t.a11y.fileDropZone}
       onDragEnter={handleDrag}
       onDragOver={handleDrag}
       onDragLeave={handleDrag}
@@ -239,7 +239,7 @@ export function Dropzone({
           <p className={cn("font-medium", compact ? "text-sm" : "text-base", "text-foreground/80")}>
             {t.dropzone.dropPrompt}
           </p>
-          <p className="text-sm text-muted-foreground/70">{t.dropzone.browseOrPaste}</p>
+          <p className="text-sm text-muted-foreground">{t.dropzone.browseOrPaste}</p>
         </div>
         <button
           type="button"
@@ -256,7 +256,7 @@ export function Dropzone({
           <Upload className="h-4 w-4" />
           {t.common.upload}
         </button>
-        <p className="text-xs text-muted-foreground/50">
+        <p className="text-xs text-muted-foreground">
           {acceptDescription ?? t.dropzone.defaultFormats}
         </p>
 
diff --git a/apps/web/src/components/common/file-library-modal.tsx b/apps/web/src/components/common/file-library-modal.tsx
index 05ccadb9..b0f91dde 100644
--- a/apps/web/src/components/common/file-library-modal.tsx
+++ b/apps/web/src/components/common/file-library-modal.tsx
@@ -1,6 +1,7 @@
 import { Check, FolderOpen, ImageIcon, Loader2, Search, X } from "lucide-react";
 import { useCallback, useEffect, useRef, useState } from "react";
 import { useTranslation } from "@/contexts/i18n-context";
+import { useFocusTrap } from "@/hooks/use-focus-trap";
 import {
   apiListFiles,
   formatHeaders,
@@ -40,7 +41,7 @@ function AuthImage({ src, alt, className }: { src: string; alt: string; classNam
   if (failed) {
     return (
       <div className={cn("flex items-center justify-center bg-muted/50", className)}>
-        <ImageIcon className="h-8 w-8 text-muted-foreground/50" />
+        <ImageIcon className="h-8 w-8 text-muted-foreground" />
       </div>
     );
   }
@@ -64,6 +65,8 @@ interface FileLibraryModalProps {
 
 export function FileLibraryModal({ open, onClose, onImport }: FileLibraryModalProps) {
   const { t } = useTranslation();
+  const dialogRef = useRef<HTMLDivElement>(null);
+  useFocusTrap(dialogRef, open);
   const [files, setFiles] = useState<UserFile[]>([]);
   const [loading, setLoading] = useState(false);
   const [importing, setImporting] = useState(false);
@@ -149,11 +152,17 @@ export function FileLibraryModal({ open, onClose, onImport }: FileLibraryModalPr
         className="absolute inset-0 bg-black/50 backdrop-blur-sm cursor-default"
         onClick={onClose}
       />
-      <div className="relative z-10 w-full max-w-lg max-h-[80dvh] bg-background border border-border rounded-xl shadow-xl flex flex-col mx-4">
+      <div
+        ref={dialogRef}
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="file-library-title"
+        className="relative z-10 w-full max-w-lg max-h-[80dvh] bg-background border border-border rounded-xl shadow-xl flex flex-col mx-4"
+      >
         {/* Header */}
         <div className="flex items-center gap-3 px-4 py-3 border-b border-border shrink-0">
           <FolderOpen className="h-5 w-5 text-primary" />
-          <h2 className="text-sm font-semibold text-foreground flex-1">
+          <h2 id="file-library-title" className="text-sm font-semibold text-foreground flex-1">
             {t.automate.importFromLibrary}
           </h2>
           <button
diff --git a/apps/web/src/components/common/image-viewer.tsx b/apps/web/src/components/common/image-viewer.tsx
index 8d5be27d..773071f6 100644
--- a/apps/web/src/components/common/image-viewer.tsx
+++ b/apps/web/src/components/common/image-viewer.tsx
@@ -1,6 +1,7 @@
 import { useGesture } from "@use-gesture/react";
 import { FileImage, Maximize, Minimize2, ZoomIn, ZoomOut } from "lucide-react";
 import { useCallback, useEffect, useRef, useState } from "react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { formatFileSize } from "@/lib/download";
 import { cn } from "@/lib/utils";
 
@@ -49,6 +50,7 @@ export function ImageViewer({
   imageWrapperStyle,
   imageWrapperChildren,
 }: ImageViewerProps) {
+  const { t } = useTranslation();
   const [zoom, setZoom] = useState(DEFAULT_ZOOM);
   const [naturalWidth, setNaturalWidth] = useState<number | null>(null);
   const [naturalHeight, setNaturalHeight] = useState<number | null>(null);
@@ -203,6 +205,7 @@ export function ImageViewer({
           disabled={zoom <= ZOOM_STEPS[0]}
           className="p-1.5 rounded hover:bg-muted text-muted-foreground hover:text-foreground disabled:opacity-30 disabled:cursor-not-allowed"
           title="Zoom out"
+          aria-label={t.a11y.zoomOut}
         >
           <ZoomOut className="h-4 w-4" />
         </button>
@@ -215,6 +218,7 @@ export function ImageViewer({
           disabled={zoom >= ZOOM_STEPS[ZOOM_STEPS.length - 1]}
           className="p-1.5 rounded hover:bg-muted text-muted-foreground hover:text-foreground disabled:opacity-30 disabled:cursor-not-allowed"
           title="Zoom in"
+          aria-label={t.a11y.zoomIn}
         >
           <ZoomIn className="h-4 w-4" />
         </button>
@@ -224,6 +228,7 @@ export function ImageViewer({
           onClick={fitToContainer}
           className={`px-2 py-1 rounded text-xs ${fitMode === "fit" ? "bg-primary/10 text-primary" : "text-muted-foreground hover:text-foreground hover:bg-muted"}`}
           title="Fit to view"
+          aria-label={t.a11y.fitToView}
         >
           <Maximize className="h-3.5 w-3.5" />
         </button>
@@ -232,6 +237,7 @@ export function ImageViewer({
           onClick={actualSize}
           className={`px-2 py-1 rounded text-xs ${fitMode === "actual" && zoom === 100 ? "bg-primary/10 text-primary" : "text-muted-foreground hover:text-foreground hover:bg-muted"}`}
           title="Actual size (100%)"
+          aria-label={t.a11y.actualSize}
         >
           <Minimize2 className="h-3.5 w-3.5" />
         </button>
@@ -251,7 +257,7 @@ export function ImageViewer({
           <div className="flex flex-col items-center justify-center gap-3 text-center">
             <FileImage className="h-8 w-8 text-muted-foreground" />
             <p className="text-sm text-muted-foreground">Preview not available</p>
-            <p className="text-xs text-muted-foreground/60">{filename}</p>
+            <p className="text-xs text-muted-foreground">{filename}</p>
           </div>
         ) : bgPreview?.backgroundSrc || bgPreview?.containerBackground ? (
           /* Layered bg-removal preview: background layer + subject layer */
diff --git a/apps/web/src/components/common/multi-image-viewer.tsx b/apps/web/src/components/common/multi-image-viewer.tsx
index ab78595d..25f13645 100644
--- a/apps/web/src/components/common/multi-image-viewer.tsx
+++ b/apps/web/src/components/common/multi-image-viewer.tsx
@@ -3,6 +3,7 @@ import { useCallback } from "react";
 import { BeforeAfterSlider } from "@/components/common/before-after-slider";
 import { ImageViewer } from "@/components/common/image-viewer";
 import { ThumbnailStrip } from "@/components/common/thumbnail-strip";
+import { useTranslation } from "@/contexts/i18n-context";
 import { useFileStore } from "@/stores/file-store";
 
 const BROWSER_PREVIEWABLE_EXTS = new Set([
@@ -24,6 +25,7 @@ function canBrowserPreview(url: string): boolean {
 }
 
 export function MultiImageViewer() {
+  const { t } = useTranslation();
   const { entries, selectedIndex, setSelectedIndex, navigateNext, navigatePrev } = useFileStore();
 
   const handleKeyDown = useCallback(
@@ -65,7 +67,7 @@ export function MultiImageViewer() {
 
   return (
     <section
-      aria-label="Image viewer"
+      aria-label={t.a11y.imageViewer}
       className="flex flex-col w-full h-full min-h-0"
       onKeyDown={hasMultiple ? handleKeyDown : undefined}
       tabIndex={hasMultiple ? 0 : undefined}
@@ -76,7 +78,7 @@ export function MultiImageViewer() {
             type="button"
             onClick={navigatePrev}
             className="absolute left-3 z-10 w-8 h-8 rounded-full bg-background/80 border border-border shadow-sm flex items-center justify-center hover:bg-background transition-colors"
-            aria-label="Previous image"
+            aria-label={t.a11y.previousImage}
           >
             <ChevronLeft className="h-4 w-4" />
           </button>
@@ -120,7 +122,7 @@ export function MultiImageViewer() {
             type="button"
             onClick={navigateNext}
             className="absolute right-3 z-10 w-8 h-8 rounded-full bg-background/80 border border-border shadow-sm flex items-center justify-center hover:bg-background transition-colors"
-            aria-label="Next image"
+            aria-label={t.a11y.nextImage}
           >
             <ChevronRight className="h-4 w-4" />
           </button>
diff --git a/apps/web/src/components/common/progress-card.tsx b/apps/web/src/components/common/progress-card.tsx
index a8ad84be..30be0e9e 100644
--- a/apps/web/src/components/common/progress-card.tsx
+++ b/apps/web/src/components/common/progress-card.tsx
@@ -22,7 +22,11 @@ export function ProgressCard({ active, phase, label, stage, percent, elapsed }:
   const sublabel = [stage, `${elapsed}s`].filter(Boolean).join(" · ");
 
   return (
-    <div className="bg-muted/80 border border-border rounded-xl p-3 space-y-2.5">
+    <div
+      role="status"
+      aria-live="polite"
+      className="bg-muted/80 border border-border rounded-xl p-3 space-y-2.5"
+    >
       <div className="flex items-center gap-2.5">
         <div className="w-8 h-8 rounded-lg bg-primary/10 flex items-center justify-center shrink-0">
           {icon}
diff --git a/apps/web/src/components/common/route-announcer.tsx b/apps/web/src/components/common/route-announcer.tsx
new file mode 100644
index 00000000..e1ff1a7d
--- /dev/null
+++ b/apps/web/src/components/common/route-announcer.tsx
@@ -0,0 +1,48 @@
+import { useEffect, useRef } from "react";
+import { useLocation } from "react-router-dom";
+
+export function RouteAnnouncer() {
+  const location = useLocation();
+  const isFirstRender = useRef(true);
+  const announcerRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    if (isFirstRender.current) {
+      isFirstRender.current = false;
+      return;
+    }
+
+    const timer = setTimeout(() => {
+      const h1 = document.querySelector("h1");
+      if (h1) {
+        if (!h1.hasAttribute("tabindex")) {
+          h1.setAttribute("tabindex", "-1");
+        }
+        h1.focus({ preventScroll: true });
+        if (announcerRef.current) {
+          announcerRef.current.textContent = h1.textContent || "";
+        }
+      } else {
+        const main = document.getElementById("main-content");
+        if (main) {
+          if (!main.hasAttribute("tabindex")) {
+            main.setAttribute("tabindex", "-1");
+          }
+          main.focus({ preventScroll: true });
+        }
+      }
+    }, 300);
+
+    return () => clearTimeout(timer);
+  }, [location.pathname]);
+
+  return (
+    <div
+      ref={announcerRef}
+      className="sr-only"
+      aria-live="polite"
+      aria-atomic="true"
+      role="status"
+    />
+  );
+}
diff --git a/apps/web/src/components/common/search-bar.tsx b/apps/web/src/components/common/search-bar.tsx
index 9c428cf0..2de2dd6d 100644
--- a/apps/web/src/components/common/search-bar.tsx
+++ b/apps/web/src/components/common/search-bar.tsx
@@ -19,6 +19,7 @@ export function SearchBar({ value, onChange, placeholder }: SearchBarProps) {
         value={value}
         onChange={(e) => onChange(e.target.value)}
         placeholder={resolvedPlaceholder}
+        aria-label={resolvedPlaceholder}
         className="w-full ps-10 pe-4 py-2 rounded-lg border border-border bg-background text-sm text-foreground focus:outline-none focus:ring-2 focus:ring-primary/20"
       />
     </div>
diff --git a/apps/web/src/components/common/tool-card.tsx b/apps/web/src/components/common/tool-card.tsx
index e328501b..19e44e4d 100644
--- a/apps/web/src/components/common/tool-card.tsx
+++ b/apps/web/src/components/common/tool-card.tsx
@@ -36,8 +36,9 @@ export function ToolCard({ tool }: ToolCardProps) {
     <div className="group flex items-center gap-3 relative">
       <button
         type="button"
-        className="opacity-0 group-hover:opacity-100 transition-opacity absolute -left-5"
+        className="opacity-0 group-hover:opacity-100 focus-visible:opacity-100 transition-opacity absolute -left-7 p-2"
         title={t.toolCard.addToFavourites}
+        aria-label={t.toolCard.addToFavourites}
       >
         <Star className="h-3 w-3 text-muted-foreground hover:text-yellow-500" />
       </button>
@@ -58,10 +59,26 @@ export function ToolCard({ tool }: ToolCardProps) {
             {t.common.experimental}
           </span>
         )}
-        {aiStatus === "not_installed" && <Download className="h-3.5 w-3.5 text-muted-foreground" />}
-        {aiStatus === "queued" && <Clock className="h-3.5 w-3.5 text-muted-foreground" />}
+        {aiStatus === "not_installed" && (
+          <>
+            <Download className="h-3.5 w-3.5 text-muted-foreground" aria-hidden="true" />
+            <span className="sr-only">{t.a11y.notInstalled}</span>
+          </>
+        )}
+        {aiStatus === "queued" && (
+          <>
+            <Clock className="h-3.5 w-3.5 text-muted-foreground" aria-hidden="true" />
+            <span className="sr-only">{t.a11y.queued}</span>
+          </>
+        )}
         {aiStatus === "installing" && (
-          <Loader2 className="h-3.5 w-3.5 text-muted-foreground animate-spin" />
+          <>
+            <Loader2
+              className="h-3.5 w-3.5 text-muted-foreground animate-spin"
+              aria-hidden="true"
+            />
+            <span className="sr-only">{t.a11y.installing}</span>
+          </>
         )}
       </Link>
     </div>
diff --git a/apps/web/src/components/common/url-import-modal.tsx b/apps/web/src/components/common/url-import-modal.tsx
index 6a0dcf22..e91d8332 100644
--- a/apps/web/src/components/common/url-import-modal.tsx
+++ b/apps/web/src/components/common/url-import-modal.tsx
@@ -1,6 +1,7 @@
 import { AlertCircle, Check, Clock, Link, Loader2, RotateCw, X } from "lucide-react";
-import { useCallback, useEffect, useState } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import { useTranslation } from "@/contexts/i18n-context";
+import { useFocusTrap } from "@/hooks/use-focus-trap";
 import { type UrlImportEntry, useUrlImport } from "@/hooks/use-url-import";
 import { format } from "@/lib/format";
 import { extractUrls } from "@/lib/url-parser";
@@ -45,6 +46,8 @@ function filenameFromUrl(url: string): string {
 
 export function UrlImportModal({ onClose, onImport }: UrlImportModalProps) {
   const { t } = useTranslation();
+  const dialogRef = useRef<HTMLDivElement>(null);
+  useFocusTrap(dialogRef, true);
   const [text, setText] = useState("");
   const [adding, setAdding] = useState(false);
 
@@ -104,18 +107,22 @@ export function UrlImportModal({ onClose, onImport }: UrlImportModalProps) {
 
       {/* Modal card */}
       <div
+        ref={dialogRef}
         role="dialog"
         aria-modal="true"
+        aria-labelledby="url-import-title"
         className="relative z-10 w-full max-w-lg bg-background border border-border rounded-xl shadow-xl flex flex-col mx-4"
       >
         {/* Header */}
         <div className="flex items-center gap-3 px-4 py-3 border-b border-border shrink-0">
           <Link className="h-5 w-5 text-primary" />
-          <h2 className="text-sm font-semibold text-foreground flex-1">{t.urlImport.title}</h2>
+          <h2 id="url-import-title" className="text-sm font-semibold text-foreground flex-1">
+            {t.urlImport.title}
+          </h2>
           <button
             type="button"
             onClick={handleClose}
-            aria-label="Close"
+            aria-label={t.common.close}
             className="p-1.5 rounded-lg hover:bg-muted text-muted-foreground"
           >
             <X className="h-4 w-4" />
@@ -190,7 +197,7 @@ export function UrlImportModal({ onClose, onImport }: UrlImportModalProps) {
                 >
                   {adding ? (
                     <>
-                      <Loader2 className="h-4 w-4 animate-spin" />
+                      <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />
                       {t.urlImport.adding}
                     </>
                   ) : (
@@ -215,7 +222,7 @@ export function UrlImportModal({ onClose, onImport }: UrlImportModalProps) {
                 >
                   {importing ? (
                     <>
-                      <Loader2 className="h-4 w-4 animate-spin" />
+                      <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />
                       {t.urlImport.adding}
                     </>
                   ) : (
diff --git a/apps/web/src/components/editor/common/canvas-resize-dialog.tsx b/apps/web/src/components/editor/common/canvas-resize-dialog.tsx
index 5d1b64c9..72b425fd 100644
--- a/apps/web/src/components/editor/common/canvas-resize-dialog.tsx
+++ b/apps/web/src/components/editor/common/canvas-resize-dialog.tsx
@@ -1,5 +1,6 @@
 import { X } from "lucide-react";
 import { useCallback, useEffect, useState } from "react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 import type { AnchorPosition } from "@/types/editor";
@@ -21,6 +22,7 @@ const ANCHOR_POSITIONS: AnchorPosition[] = [
 ];
 
 export function CanvasResizeDialog({ open, onClose }: { open: boolean; onClose: () => void }) {
+  const { t } = useTranslation();
   const canvasSize = useEditorStore((s) => s.canvasSize);
   const resizeCanvas = useEditorStore((s) => s.resizeCanvas);
 
@@ -57,7 +59,7 @@ export function CanvasResizeDialog({ open, onClose }: { open: boolean; onClose:
           <button
             type="button"
             onClick={onClose}
-            aria-label="Close"
+            aria-label={t.common.close}
             className="flex h-6 w-6 items-center justify-center rounded text-muted-foreground hover:bg-muted hover:text-foreground"
           >
             <X className="h-4 w-4" />
diff --git a/apps/web/src/components/editor/common/export-dialog.tsx b/apps/web/src/components/editor/common/export-dialog.tsx
index 345423d4..c97a60b8 100644
--- a/apps/web/src/components/editor/common/export-dialog.tsx
+++ b/apps/web/src/components/editor/common/export-dialog.tsx
@@ -13,6 +13,7 @@ import {
 } from "lucide-react";
 import { useCallback, useEffect, useRef, useState } from "react";
 import { editorStageRefHolder } from "@/components/editor/editor-canvas";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 import type {
@@ -63,6 +64,7 @@ function getMimeType(format: ExportFormat): string {
 }
 
 export function ExportDialog({ onClose }: { onClose: () => void }) {
+  const { t } = useTranslation();
   const canvasSize = useEditorStore((s) => s.canvasSize);
   const markClean = useEditorStore((s) => s.markClean);
 
@@ -454,7 +456,7 @@ export function ExportDialog({ onClose }: { onClose: () => void }) {
             type="button"
             onClick={onClose}
             className="p-1 text-muted-foreground hover:text-foreground rounded transition-colors"
-            aria-label="Close"
+            aria-label={t.common.close}
           >
             <X size={16} />
           </button>
diff --git a/apps/web/src/components/editor/common/fill-dialog.tsx b/apps/web/src/components/editor/common/fill-dialog.tsx
index e05ac161..91945bec 100644
--- a/apps/web/src/components/editor/common/fill-dialog.tsx
+++ b/apps/web/src/components/editor/common/fill-dialog.tsx
@@ -1,6 +1,7 @@
 // apps/web/src/components/editor/common/fill-dialog.tsx
 
 import { useCallback, useEffect, useState } from "react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn, generateId } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 import type { CanvasObject } from "@/types/editor";
@@ -44,6 +45,7 @@ function resolveColor(
 }
 
 export function FillDialog({ open, onClose }: FillDialogProps) {
+  const { t } = useTranslation();
   const [content, setContent] = useState<FillContent>("foreground");
   const [customColor, setCustomColor] = useState("#ff0000");
   const [opacity, setOpacity] = useState(100);
@@ -119,7 +121,7 @@ export function FillDialog({ open, onClose }: FillDialogProps) {
       <div
         className="w-80 rounded-lg bg-card border border-border shadow-xl p-4"
         role="dialog"
-        aria-label="Fill"
+        aria-label={t.a11y.fill}
       >
         <h3 className="text-sm font-semibold text-foreground mb-3">Fill</h3>
 
diff --git a/apps/web/src/components/editor/common/image-resize-dialog.tsx b/apps/web/src/components/editor/common/image-resize-dialog.tsx
index 0e83ec6c..a8c2cea1 100644
--- a/apps/web/src/components/editor/common/image-resize-dialog.tsx
+++ b/apps/web/src/components/editor/common/image-resize-dialog.tsx
@@ -1,9 +1,11 @@
 import { Lock, Unlock, X } from "lucide-react";
 import { useCallback, useEffect, useState } from "react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 
 export function ImageResizeDialog({ open, onClose }: { open: boolean; onClose: () => void }) {
+  const { t } = useTranslation();
   const canvasSize = useEditorStore((s) => s.canvasSize);
   const resizeImage = useEditorStore((s) => s.resizeImage);
 
@@ -68,7 +70,7 @@ export function ImageResizeDialog({ open, onClose }: { open: boolean; onClose: (
           <button
             type="button"
             onClick={onClose}
-            aria-label="Close"
+            aria-label={t.common.close}
             className="flex h-6 w-6 items-center justify-center rounded text-muted-foreground hover:bg-muted hover:text-foreground"
           >
             <X className="h-4 w-4" />
diff --git a/apps/web/src/components/editor/common/loading-overlay.tsx b/apps/web/src/components/editor/common/loading-overlay.tsx
index 21faa990..f0e96b77 100644
--- a/apps/web/src/components/editor/common/loading-overlay.tsx
+++ b/apps/web/src/components/editor/common/loading-overlay.tsx
@@ -1,9 +1,11 @@
 // apps/web/src/components/editor/common/loading-overlay.tsx
 import { X } from "lucide-react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 
 export function LoadingOverlay() {
+  const { t } = useTranslation();
   const loadingState = useEditorStore((s) => s.loadingState);
   const setLoadingState = useEditorStore((s) => s.setLoadingState);
 
@@ -43,7 +45,7 @@ export function LoadingOverlay() {
             type="button"
             onClick={() => setLoadingState(null)}
             className="flex items-center gap-1 text-xs text-muted-foreground hover:text-foreground mt-1"
-            aria-label="Cancel operation"
+            aria-label={t.a11y.cancelOperation}
           >
             <X size={12} />
             Cancel
diff --git a/apps/web/src/components/editor/common/welcome-screen.tsx b/apps/web/src/components/editor/common/welcome-screen.tsx
index 9caf77b5..56446757 100644
--- a/apps/web/src/components/editor/common/welcome-screen.tsx
+++ b/apps/web/src/components/editor/common/welcome-screen.tsx
@@ -60,7 +60,7 @@ export function WelcomeScreen() {
   return (
     <>
       <section
-        aria-label="Image drop zone"
+        aria-label={t.a11y.imageDropZone}
         className="absolute inset-0 flex items-center justify-center z-10"
         onDrop={handleDrop}
         onDragOver={handleDragOver}
diff --git a/apps/web/src/components/editor/editor-menu-bar.tsx b/apps/web/src/components/editor/editor-menu-bar.tsx
index 6c3e5e2a..95653eb0 100644
--- a/apps/web/src/components/editor/editor-menu-bar.tsx
+++ b/apps/web/src/components/editor/editor-menu-bar.tsx
@@ -404,7 +404,7 @@ function MenuItemRow({ item, onClose }: { item: MenuItem; onClose: () => void })
           className={cn(
             "flex items-center justify-between px-3 py-1 text-xs cursor-default select-none rounded-sm",
             item.disabled
-              ? "text-muted-foreground/50"
+              ? "text-muted-foreground"
               : "text-foreground hover:bg-accent hover:text-accent-foreground",
           )}
           data-testid={`menu-item-${toTestId(item.label)}`}
@@ -436,7 +436,7 @@ function MenuItemRow({ item, onClose }: { item: MenuItem; onClose: () => void })
         className={cn(
           "flex items-center justify-between w-full px-3 py-1 text-xs cursor-default select-none rounded-sm text-start",
           item.disabled
-            ? "text-muted-foreground/50 pointer-events-none"
+            ? "text-muted-foreground pointer-events-none"
             : "text-foreground hover:bg-accent hover:text-accent-foreground",
         )}
         disabled={item.disabled}
diff --git a/apps/web/src/components/editor/editor-right-panel.tsx b/apps/web/src/components/editor/editor-right-panel.tsx
index 08eeac3b..641db5e9 100644
--- a/apps/web/src/components/editor/editor-right-panel.tsx
+++ b/apps/web/src/components/editor/editor-right-panel.tsx
@@ -1,5 +1,6 @@
 // apps/web/src/components/editor/editor-right-panel.tsx
 import { ChevronRight } from "lucide-react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 import { AdjustmentsPanel } from "./panels/adjustments-panel";
@@ -15,6 +16,7 @@ const TABS = [
 ];
 
 export function EditorRightPanel() {
+  const { t } = useTranslation();
   const visible = useEditorStore((s) => s.rightPanelVisible);
   const activeTab = useEditorStore((s) => s.rightPanelTab);
   const setTab = useEditorStore((s) => s.setRightPanelTab);
@@ -27,7 +29,7 @@ export function EditorRightPanel() {
         type="button"
         onClick={togglePanel}
         className="flex items-center justify-center w-6 bg-card border-l border-border"
-        aria-label="Expand panel"
+        aria-label={t.a11y.expandPanel}
       >
         <ChevronRight size={14} className="text-muted-foreground rotate-180" />
       </button>
@@ -63,7 +65,7 @@ export function EditorRightPanel() {
           type="button"
           onClick={togglePanel}
           className="px-1.5 py-2 text-muted-foreground hover:text-foreground"
-          aria-label="Collapse panel"
+          aria-label={t.a11y.collapsePanel}
         >
           <ChevronRight size={14} />
         </button>
diff --git a/apps/web/src/components/editor/options/crop-options.tsx b/apps/web/src/components/editor/options/crop-options.tsx
index 05a5cc66..bd6afcdc 100644
--- a/apps/web/src/components/editor/options/crop-options.tsx
+++ b/apps/web/src/components/editor/options/crop-options.tsx
@@ -1,6 +1,7 @@
 import { ArrowLeftRight, Check, X } from "lucide-react";
 import { useCallback, useState } from "react";
 import { ASPECT_RATIOS } from "@/components/editor/tools/crop-tool";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 
@@ -9,6 +10,7 @@ import { useEditorStore } from "@/stores/editor-store";
 // ---------------------------------------------------------------------------
 
 export function CropOptions() {
+  const { t } = useTranslation();
   const cropState = useEditorStore((s) => s.cropState);
   const setCropState = useEditorStore((s) => s.setCropState);
   const applyCrop = useEditorStore((s) => s.applyCrop);
@@ -123,7 +125,7 @@ export function CropOptions() {
         type="button"
         onClick={handleSwap}
         title="Swap dimensions"
-        aria-label="Swap dimensions"
+        aria-label={t.a11y.swapDimensions}
         className="flex h-6 w-6 items-center justify-center rounded text-muted-foreground hover:bg-muted hover:text-foreground"
       >
         <ArrowLeftRight className="h-3.5 w-3.5" />
@@ -150,7 +152,7 @@ export function CropOptions() {
         type="button"
         onClick={handleApply}
         title="Apply Crop (Enter)"
-        aria-label="Apply Crop"
+        aria-label={t.a11y.applyCrop}
         className={cn(
           "flex h-7 items-center gap-1 rounded bg-primary px-2.5 text-xs text-primary-foreground",
           "hover:bg-primary/90 transition-colors",
@@ -163,7 +165,7 @@ export function CropOptions() {
         type="button"
         onClick={handleCancel}
         title="Cancel Crop (Escape)"
-        aria-label="Cancel Crop"
+        aria-label={t.a11y.cancelCrop}
         className={cn(
           "flex h-7 items-center gap-1 rounded border border-border px-2.5 text-xs",
           "text-muted-foreground hover:bg-muted hover:text-foreground transition-colors",
diff --git a/apps/web/src/components/editor/options/text-options.tsx b/apps/web/src/components/editor/options/text-options.tsx
index 1c1ca65a..bc93867d 100644
--- a/apps/web/src/components/editor/options/text-options.tsx
+++ b/apps/web/src/components/editor/options/text-options.tsx
@@ -11,6 +11,7 @@ import {
   Underline,
 } from "lucide-react";
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 import type { TextAttrs } from "@/types/editor";
@@ -131,6 +132,7 @@ function NumberInput({
 // ---------------------------------------------------------------------------
 
 function FontDropdown({ value, onChange }: { value: string; onChange: (name: string) => void }) {
+  const { t } = useTranslation();
   const [open, setOpen] = useState(false);
   const containerRef = useRef<HTMLDivElement>(null);
   const fonts = useMemo(() => getAllFonts(), []);
@@ -162,7 +164,7 @@ function FontDropdown({ value, onChange }: { value: string; onChange: (name: str
     <div ref={containerRef} className="relative">
       <button
         type="button"
-        aria-label="Font family"
+        aria-label={t.a11y.fontFamily}
         onClick={() => setOpen((v) => !v)}
         className={cn(
           "flex items-center gap-1.5 h-7 px-2 rounded border border-border bg-background",
@@ -231,6 +233,7 @@ function FontDropdown({ value, onChange }: { value: string; onChange: (name: str
 // ---------------------------------------------------------------------------
 
 export function TextOptions() {
+  const { t } = useTranslation();
   const selectedObjectIds = useEditorStore((s) => s.selectedObjectIds);
   const objects = useEditorStore((s) => s.objects);
 
@@ -409,7 +412,7 @@ export function TextOptions() {
         />
         <input
           type="color"
-          aria-label="Text color"
+          aria-label={t.a11y.textColor}
           value={attrs.fill}
           onChange={(e) => updateSelected({ fill: e.target.value })}
           className="absolute inset-0 opacity-0 cursor-pointer w-full h-full"
diff --git a/apps/web/src/components/editor/options/transform-options.tsx b/apps/web/src/components/editor/options/transform-options.tsx
index fe44d9aa..0f13f9db 100644
--- a/apps/web/src/components/editor/options/transform-options.tsx
+++ b/apps/web/src/components/editor/options/transform-options.tsx
@@ -1,6 +1,7 @@
 import { Check, FlipHorizontal2, FlipVertical2, Lock, Unlock, X } from "lucide-react";
 import { useCallback } from "react";
 import type { TransformToolApi } from "@/components/editor/tools/transform-tool";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 
 // ---------------------------------------------------------------------------
@@ -55,6 +56,7 @@ function NumericInput({
 }
 
 export function TransformOptions({ api }: { api: TransformToolApi }) {
+  const { t } = useTranslation();
   const {
     values,
     lockedAspect,
@@ -132,7 +134,7 @@ export function TransformOptions({ api }: { api: TransformToolApi }) {
         type="button"
         onClick={flipHorizontal}
         title="Flip Horizontal"
-        aria-label="Flip Horizontal"
+        aria-label={t.a11y.flipHorizontal}
         className="flex h-7 w-7 items-center justify-center rounded text-muted-foreground hover:bg-muted hover:text-foreground transition-colors"
       >
         <FlipHorizontal2 className="h-4 w-4" />
@@ -141,7 +143,7 @@ export function TransformOptions({ api }: { api: TransformToolApi }) {
         type="button"
         onClick={flipVertical}
         title="Flip Vertical"
-        aria-label="Flip Vertical"
+        aria-label={t.a11y.flipVertical}
         className="flex h-7 w-7 items-center justify-center rounded text-muted-foreground hover:bg-muted hover:text-foreground transition-colors"
       >
         <FlipVertical2 className="h-4 w-4" />
diff --git a/apps/web/src/components/editor/panels/color-panel.tsx b/apps/web/src/components/editor/panels/color-panel.tsx
index 7bc0c20d..c2dd8eed 100644
--- a/apps/web/src/components/editor/panels/color-panel.tsx
+++ b/apps/web/src/components/editor/panels/color-panel.tsx
@@ -3,6 +3,7 @@
 import { ArrowLeftRight, RotateCcw } from "lucide-react";
 import { useCallback, useEffect, useRef, useState } from "react";
 import { HexColorPicker } from "react-colorful";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 import { ColorSwatch } from "../common/color-swatch";
@@ -108,6 +109,7 @@ function ColorInputFields({
   color: string;
   onColorChange: (hex: string) => void;
 }) {
+  const { t } = useTranslation();
   const rgb = hexToRgb(color);
   const hsl = rgbToHsl(rgb.r, rgb.g, rgb.b);
 
@@ -130,7 +132,7 @@ function ColorInputFields({
           )}
           maxLength={7}
           spellCheck={false}
-          aria-label="Hex color value"
+          aria-label={t.a11y.hexColorValue}
           data-testid="color-hex-input"
         />
       </div>
@@ -296,6 +298,7 @@ function ColorPickerPopover({
 // --- Main component ---
 
 export function ColorPanel() {
+  const { t } = useTranslation();
   const foregroundColor = useEditorStore((s) => s.foregroundColor);
   const backgroundColor = useEditorStore((s) => s.backgroundColor);
   const recentColors = useEditorStore((s) => s.recentColors);
@@ -362,7 +365,7 @@ export function ColorPanel() {
               pickerTarget === "bg" ? "border-primary ring-1 ring-primary" : "border-border",
             )}
             style={{ backgroundColor: backgroundColor }}
-            aria-label="Background color"
+            aria-label={t.a11y.backgroundColor}
             data-testid="bg-color-swatch"
           />
           {/* Foreground swatch (top-left, overlapping) */}
@@ -374,7 +377,7 @@ export function ColorPanel() {
               pickerTarget === "fg" ? "border-primary ring-1 ring-primary" : "border-border",
             )}
             style={{ backgroundColor: foregroundColor }}
-            aria-label="Foreground color"
+            aria-label={t.a11y.foregroundColor}
             data-testid="fg-color-swatch"
           />
 
@@ -388,7 +391,7 @@ export function ColorPanel() {
               "bg-card/80 hover:bg-muted",
             )}
             title="Swap colors (X)"
-            aria-label="Swap foreground and background colors"
+            aria-label={t.a11y.swapColors}
             data-testid="swap-colors"
           >
             <ArrowLeftRight size={10} />
@@ -404,7 +407,7 @@ export function ColorPanel() {
               "bg-card/80 hover:bg-muted",
             )}
             title="Reset colors (D)"
-            aria-label="Reset to default black and white"
+            aria-label={t.a11y.resetColors}
             data-testid="reset-colors"
           >
             <RotateCcw size={10} />
@@ -426,7 +429,7 @@ export function ColorPanel() {
             )}
             maxLength={7}
             spellCheck={false}
-            aria-label="Foreground color hex value"
+            aria-label={t.a11y.foregroundHex}
             data-testid="foreground-hex-input"
           />
         </div>
diff --git a/apps/web/src/components/editor/panels/history-panel.tsx b/apps/web/src/components/editor/panels/history-panel.tsx
index 69300328..acefcfab 100644
--- a/apps/web/src/components/editor/panels/history-panel.tsx
+++ b/apps/web/src/components/editor/panels/history-panel.tsx
@@ -22,6 +22,7 @@ import {
   Undo2,
 } from "lucide-react";
 import { useCallback, useMemo, useSyncExternalStore } from "react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 
@@ -80,6 +81,7 @@ interface HistoryEntry {
 }
 
 export function HistoryPanel() {
+  const { t } = useTranslation();
   const lastAction = useEditorStore((s) => s.lastAction);
 
   // Force re-render when history changes by subscribing to history version
@@ -170,7 +172,7 @@ export function HistoryPanel() {
               ? "text-muted-foreground hover:text-foreground hover:bg-muted"
               : "text-muted-foreground/30 cursor-not-allowed",
           )}
-          aria-label="Undo"
+          aria-label={t.a11y.undo}
           title="Undo (Ctrl+Z)"
         >
           <Undo2 size={14} />
@@ -185,7 +187,7 @@ export function HistoryPanel() {
               ? "text-muted-foreground hover:text-foreground hover:bg-muted"
               : "text-muted-foreground/30 cursor-not-allowed",
           )}
-          aria-label="Redo"
+          aria-label={t.a11y.redo}
           title="Redo (Ctrl+Shift+Z)"
         >
           <Redo2 size={14} />
diff --git a/apps/web/src/components/editor/panels/layers-panel.tsx b/apps/web/src/components/editor/panels/layers-panel.tsx
index 00db0ef2..640374aa 100644
--- a/apps/web/src/components/editor/panels/layers-panel.tsx
+++ b/apps/web/src/components/editor/panels/layers-panel.tsx
@@ -14,6 +14,7 @@ import {
   Unlock,
 } from "lucide-react";
 import { useCallback, useEffect, useRef, useState } from "react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { cn } from "@/lib/utils";
 import { useEditorStore } from "@/stores/editor-store";
 import type { EditorLayer, ObjectEffects } from "@/types/editor";
@@ -80,6 +81,7 @@ const DEFAULT_STROKE: NonNullable<ObjectEffects["stroke"]> = {
 // ---------------------------------------------------------------------------
 
 export function LayersPanel() {
+  const { t } = useTranslation();
   const layers = useEditorStore((s) => s.layers);
   const activeLayerId = useEditorStore((s) => s.activeLayerId);
   const objects = useEditorStore((s) => s.objects);
@@ -167,7 +169,11 @@ export function LayersPanel() {
       </div>
 
       {/* Layer list */}
-      <div className="flex-1 overflow-y-auto py-1 min-h-0" role="listbox" aria-label="Layers">
+      <div
+        className="flex-1 overflow-y-auto py-1 min-h-0"
+        role="listbox"
+        aria-label={t.a11y.layers}
+      >
         {displayLayers.map((layer) => {
           const realIndex = layers.findIndex((l) => l.id === layer.id);
           return (
@@ -202,7 +208,7 @@ export function LayersPanel() {
           onClick={addLayer}
           className="flex items-center justify-center h-7 w-7 rounded hover:bg-muted text-muted-foreground hover:text-foreground transition-colors"
           title="New Layer (Ctrl+Shift+N)"
-          aria-label="Add layer"
+          aria-label={t.a11y.addLayer}
           data-testid="add-layer-btn"
         >
           <Plus size={16} />
@@ -217,7 +223,7 @@ export function LayersPanel() {
           disabled={layers.length <= 1}
           className="flex items-center justify-center h-7 w-7 rounded hover:bg-muted text-muted-foreground hover:text-foreground transition-colors disabled:opacity-40 disabled:cursor-not-allowed"
           title="Delete Layer"
-          aria-label="Delete layer"
+          aria-label={t.a11y.deleteLayer}
           data-testid="delete-layer-btn"
         >
           <Trash2 size={16} />
@@ -523,7 +529,7 @@ function LayerRow({
             className="w-full h-full object-cover"
           />
         ) : (
-          <Layers size={12} className="text-muted-foreground/50" />
+          <Layers size={12} className="text-muted-foreground" />
         )}
       </div>
 
@@ -673,7 +679,7 @@ function LayerEffectsSection({
 }) {
   return (
     <div className="space-y-0.5 max-h-[200px] overflow-y-auto">
-      <p className="text-[10px] font-semibold uppercase tracking-wider text-muted-foreground/70 px-1">
+      <p className="text-[10px] font-semibold uppercase tracking-wider text-muted-foreground px-1">
         Layer Effects
       </p>
 
diff --git a/apps/web/src/components/editor/panels/navigator-panel.tsx b/apps/web/src/components/editor/panels/navigator-panel.tsx
index 44cd799b..1e4a9e1a 100644
--- a/apps/web/src/components/editor/panels/navigator-panel.tsx
+++ b/apps/web/src/components/editor/panels/navigator-panel.tsx
@@ -2,6 +2,7 @@
 
 import { Minus, Plus } from "lucide-react";
 import { useCallback, useEffect, useRef, useState } from "react";
+import { useTranslation } from "@/contexts/i18n-context";
 import { useEditorStore } from "@/stores/editor-store";
 
 const THUMBNAIL_MAX_HEIGHT = 80;
@@ -10,6 +11,7 @@ const MIN_ZOOM = 0.01;
 const MAX_ZOOM = 64;
 
 export function NavigatorPanel() {
+  const { t } = useTranslation();
   const canvasRef = useRef<HTMLCanvasElement>(null);
   const containerRef = useRef<HTMLDivElement>(null);
   const isDraggingRef = useRef(false);
@@ -245,7 +247,7 @@ export function NavigatorPanel() {
           type="button"
           onClick={() => setZoom(Math.max(MIN_ZOOM, zoom / 1.2))}
           className="p-0.5 text-muted-foreground hover:text-foreground"
-          aria-label="Zoom out"
+          aria-label={t.a11y.zoomOut}
         >
           <Minus size={12} />
         </button>
@@ -262,7 +264,7 @@ export function NavigatorPanel() {
           type="button"
           onClick={() => setZoom(Math.min(MAX_ZOOM, zoom * 1.2))}
           className="p-0.5 text-muted-foreground hover:text-foreground"
-          aria-label="Zoom in"
+          aria-label={t.a11y.zoomIn}
         >
           <Plus size={12} />
         </button>
diff --git a/apps/web/src/components/files/file-details.tsx b/apps/web/src/components/files/file-details.tsx
index 494e32b9..0e643758 100644
--- a/apps/web/src/components/files/file-details.tsx
+++ b/apps/web/src/components/files/file-details.tsx
@@ -44,7 +44,7 @@ function AuthImage({ src, alt, className }: { src: string; alt: string; classNam
   if (failed) {
     return (
       <div className={cn("flex items-center justify-center bg-muted/50", className)}>
-        <ImageIcon className="h-8 w-8 text-muted-foreground/50" />
+        <ImageIcon className="h-8 w-8 text-muted-foreground" />
       </div>
     );
   }
diff --git a/apps/web/src/components/help/help-dialog.tsx b/apps/web/src/components/help/help-dialog.tsx
index b4950c4d..af98a6c3 100644
--- a/apps/web/src/components/help/help-dialog.tsx
+++ b/apps/web/src/components/help/help-dialog.tsx
@@ -1,7 +1,8 @@
 import { APP_VERSION } from "@snapotter/shared";
 import { BookOpen, ExternalLink, Github, Keyboard, X } from "lucide-react";
-import { useEffect } from "react";
+import { useEffect, useRef } from "react";
 import { useTranslation } from "@/contexts/i18n-context";
+import { useFocusTrap } from "@/hooks/use-focus-trap";
 import { formatShortcut } from "@/hooks/use-keyboard-shortcuts";
 
 interface HelpDialogProps {
@@ -25,6 +26,8 @@ const SHORTCUTS = [
 
 export function HelpDialog({ open, onClose }: HelpDialogProps) {
   const { t } = useTranslation();
+  const dialogRef = useRef<HTMLDivElement>(null);
+  useFocusTrap(dialogRef, open);
   useEffect(() => {
     if (!open) return;
     const handler = (e: KeyboardEvent) => {
@@ -44,14 +47,23 @@ export function HelpDialog({ open, onClose }: HelpDialogProps) {
         onClick={onClose}
       />
 
-      <div className="relative bg-background border border-border rounded-xl shadow-2xl w-full max-w-lg max-h-[85dvh] flex flex-col overflow-hidden">
+      <div
+        ref={dialogRef}
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="help-dialog-title"
+        className="relative bg-background border border-border rounded-xl shadow-2xl w-full max-w-lg max-h-[85dvh] flex flex-col overflow-hidden"
+      >
         {/* Header */}
         <div className="flex items-center justify-between p-4 border-b border-border shrink-0">
-          <h2 className="text-lg font-semibold text-foreground">{t.help.heading}</h2>
+          <h2 id="help-dialog-title" className="text-lg font-semibold text-foreground">
+            {t.help.heading}
+          </h2>
           <button
             type="button"
             onClick={onClose}
             className="p-1.5 rounded-lg hover:bg-muted transition-colors text-muted-foreground hover:text-foreground"
+            aria-label={t.a11y.closeHelp}
           >
             <X className="h-4 w-4" />
           </button>
diff --git a/apps/web/src/components/layout/app-layout.tsx b/apps/web/src/components/layout/app-layout.tsx
index 5e233708..8112f1f3 100644
--- a/apps/web/src/components/layout/app-layout.tsx
+++ b/apps/web/src/components/layout/app-layout.tsx
@@ -1,6 +1,7 @@
 import { Globe, Menu, X } from "lucide-react";
-import { useState } from "react";
+import { useRef, useState } from "react";
 import { useTranslation } from "@/contexts/i18n-context";
+import { useFocusTrap } from "@/hooks/use-focus-trap";
 import { useMobile } from "@/hooks/use-mobile";
 import { cn } from "@/lib/utils";
 import { useConnectionStore } from "@/stores/connection-store";
@@ -30,7 +31,9 @@ export function AppLayout({
   const [settingsOpen, setSettingsOpen] = useState(false);
   const [helpOpen, setHelpOpen] = useState(false);
   const [mobileSidebarOpen, setMobileSidebarOpen] = useState(false);
-  const { locale, setLocale, supportedLocales } = useTranslation();
+  const mobileSidebarRef = useRef<HTMLDivElement>(null);
+  useFocusTrap(mobileSidebarRef, mobileSidebarOpen);
+  const { t, locale, setLocale, supportedLocales } = useTranslation();
   const isMobile = useMobile();
   const connectionStatus = useConnectionStore((s) => s.status);
   const bannerVisible = connectionStatus !== "connected";
@@ -58,7 +61,13 @@ export function AppLayout({
             className="fixed inset-0 z-40 bg-black/50 backdrop-blur-sm cursor-default"
             onClick={() => setMobileSidebarOpen(false)}
           />
-          <div className="fixed inset-y-0 left-0 z-50 w-64 bg-background border-r border-border shadow-xl animate-in slide-in-from-left">
+          <div
+            ref={mobileSidebarRef}
+            role="dialog"
+            aria-modal="true"
+            aria-label={t.a11y.openSidebar}
+            className="fixed inset-y-0 left-0 z-50 w-64 bg-background border-r border-border shadow-xl animate-in slide-in-from-left"
+          >
             <div className="flex items-center justify-between p-3 border-b border-border">
               <div className="flex items-center gap-2">
                 <OtterLogo className="h-5 w-5 text-primary" />
@@ -70,6 +79,7 @@ export function AppLayout({
                 type="button"
                 onClick={() => setMobileSidebarOpen(false)}
                 className="p-2.5 rounded-lg hover:bg-muted"
+                aria-label={t.a11y.closeSidebar}
               >
                 <X className="h-5 w-5" />
               </button>
@@ -118,6 +128,7 @@ export function AppLayout({
             type="button"
             onClick={() => setMobileSidebarOpen(true)}
             className="p-2.5 -ms-1 rounded-lg hover:bg-muted"
+            aria-label={t.a11y.openSidebar}
           >
             <Menu className="h-5 w-5" />
           </button>
@@ -132,7 +143,10 @@ export function AppLayout({
 
       {showToolPanel && !isMobile && <ToolPanel />}
 
-      <main className={cn("flex-1 flex flex-col overflow-hidden", isMobile && "pt-12 pb-20")}>
+      <main
+        id="main-content"
+        className={cn("flex-1 flex flex-col overflow-hidden", isMobile && "pt-12 pb-20")}
+      >
         <div className="flex-1 overflow-y-auto p-6 flex items-center justify-center">
           {children || <Dropzone onFiles={onFiles} onUrlImport={onUrlImport} accept="image/*" />}
         </div>
diff --git a/apps/web/src/components/layout/footer.tsx b/apps/web/src/components/layout/footer.tsx
index 8663b774..46b40642 100644
--- a/apps/web/src/components/layout/footer.tsx
+++ b/apps/web/src/components/layout/footer.tsx
@@ -4,7 +4,7 @@ import { useTranslation } from "@/contexts/i18n-context";
 import { useTheme } from "@/hooks/use-theme";
 
 function LanguageSelector() {
-  const { locale, setLocale, supportedLocales } = useTranslation();
+  const { t, locale, setLocale, supportedLocales } = useTranslation();
   const [open, setOpen] = useState(false);
   const ref = useRef<HTMLDivElement>(null);
 
@@ -52,7 +52,7 @@ function LanguageSelector() {
                   stroke="currentColor"
                   strokeWidth="2"
                   role="img"
-                  aria-label="Selected"
+                  aria-label={t.a11y.selected}
                 >
                   <polyline points="20 6 9 17 4 12" />
                 </svg>
diff --git a/apps/web/src/components/layout/sidebar.tsx b/apps/web/src/components/layout/sidebar.tsx
index c253afb1..b9abb97d 100644
--- a/apps/web/src/components/layout/sidebar.tsx
+++ b/apps/web/src/components/layout/sidebar.tsx
@@ -44,6 +44,7 @@ export function Sidebar({
   expanded = false,
 }: SidebarProps) {
   const location = useLocation();
+  const { t } = useTranslation();
   const { topItems, bottomItems } = useNavItems();
 
   const renderItem = (item: SidebarItem, isActive: boolean) => {
@@ -101,11 +102,11 @@ export function Sidebar({
 
   if (expanded) {
     return (
-      <div className="flex flex-col p-3 gap-1">
+      <nav aria-label={t.a11y.navigationMenu} className="flex flex-col p-3 gap-1">
         {topItems.map((item) => renderItem(item, location.pathname === item.href))}
         <div className="border-t border-border my-2" />
         {bottomItems.map((item) => renderItem(item, false))}
-      </div>
+      </nav>
     );
   }
 
@@ -115,9 +116,9 @@ export function Sidebar({
         <OtterLogo className="h-7 w-7 text-primary" />
       </div>
       <div className="border-t border-border w-10 mb-2" />
-      <div className="flex flex-col gap-1 flex-1">
+      <nav aria-label={t.a11y.navigationMenu} className="flex flex-col gap-1 flex-1">
         {topItems.map((item) => renderItem(item, location.pathname === item.href))}
-      </div>
+      </nav>
       <div className="border-t border-border w-10 my-2" />
       <div className="flex flex-col gap-1">
         {bottomItems.map((item) => renderItem(item, false))}
diff --git a/apps/web/src/components/settings/ai-features-section.tsx b/apps/web/src/components/settings/ai-features-section.tsx
index f57e27fd..1cb6886a 100644
--- a/apps/web/src/components/settings/ai-features-section.tsx
+++ b/apps/web/src/components/settings/ai-features-section.tsx
@@ -299,7 +299,7 @@ function BundleCard({
               disabled
               className="flex items-center gap-1.5 px-3 py-1.5 rounded-lg bg-primary text-primary-foreground text-sm font-medium opacity-50"
             >
-              <Loader2 className="h-3.5 w-3.5 animate-spin" />
+              <Loader2 className="h-3.5 w-3.5 animate-spin" aria-hidden="true" />
               {t.settings.aiFeatures.installing}
             </button>
           )}
diff --git a/apps/web/src/components/settings/settings-dialog.tsx b/apps/web/src/components/settings/settings-dialog.tsx
index a7f43cdd..47f1f0c9 100644
--- a/apps/web/src/components/settings/settings-dialog.tsx
+++ b/apps/web/src/components/settings/settings-dialog.tsx
@@ -26,9 +26,10 @@ import {
   Wrench,
   X,
 } from "lucide-react";
-import { Fragment, useCallback, useEffect, useMemo, useState } from "react";
+import { Fragment, useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { useTranslation } from "@/contexts/i18n-context";
 import { useAuth } from "@/hooks/use-auth";
+import { useFocusTrap } from "@/hooks/use-focus-trap";
 import { useMobile } from "@/hooks/use-mobile";
 import { apiDelete, apiGet, apiPost, apiPut, clearToken, formatHeaders } from "@/lib/api";
 import { format, plural } from "@/lib/format";
@@ -127,6 +128,10 @@ export function SettingsDialog({ open, onClose }: SettingsDialogProps) {
   const { t } = useTranslation();
   const isMobile = useMobile();
   const NAV_ITEMS = useNavItems();
+  const dialogRef = useRef<HTMLDivElement>(null);
+  const mobileDialogRef = useRef<HTMLDivElement>(null);
+  useFocusTrap(dialogRef, open && !isMobile);
+  useFocusTrap(mobileDialogRef, open && isMobile);
 
   const visibleNavItems = NAV_ITEMS.filter(
     (item) =>
@@ -148,14 +153,23 @@ export function SettingsDialog({ open, onClose }: SettingsDialogProps) {
 
   if (isMobile) {
     return (
-      <div className="fixed inset-0 z-50 flex flex-col bg-background">
+      <div
+        ref={mobileDialogRef}
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="settings-dialog-title-mobile"
+        className="fixed inset-0 z-50 flex flex-col bg-background"
+      >
         {/* Mobile header */}
         <div className="flex items-center justify-between px-4 pt-4 pb-2 shrink-0">
-          <h2 className="text-sm font-semibold text-foreground">{t.settings.heading}</h2>
+          <h2 id="settings-dialog-title-mobile" className="text-sm font-semibold text-foreground">
+            {t.settings.heading}
+          </h2>
           <button
             type="button"
             onClick={onClose}
             className="p-2.5 rounded-lg hover:bg-muted transition-colors text-muted-foreground hover:text-foreground"
+            aria-label={t.a11y.closeSettings}
           >
             <X className="h-5 w-5" />
           </button>
@@ -169,7 +183,7 @@ export function SettingsDialog({ open, onClose }: SettingsDialogProps) {
               type="button"
               onClick={() => setSection(item.id)}
               className={cn(
-                "flex items-center gap-1.5 px-3 py-1.5 rounded-full text-xs font-medium whitespace-nowrap shrink-0",
+                "flex items-center gap-1.5 px-3 py-2.5 rounded-full text-xs font-medium whitespace-nowrap shrink-0",
                 section === item.id
                   ? "bg-primary text-primary-foreground"
                   : "bg-muted text-muted-foreground",
@@ -211,14 +225,18 @@ export function SettingsDialog({ open, onClose }: SettingsDialogProps) {
 
       {/* Dialog */}
       <div
+        ref={dialogRef}
         role="dialog"
         aria-modal="true"
+        aria-labelledby="settings-dialog-title"
         className="relative bg-background border border-border rounded-xl shadow-2xl w-full max-w-3xl h-[85dvh] flex overflow-hidden"
       >
         {/* Sidebar nav */}
         <div className="w-48 border-r border-border bg-muted/30 p-3 space-y-1 shrink-0">
           <div className="flex items-center justify-between mb-4 px-2">
-            <h2 className="text-sm font-semibold text-foreground">{t.settings.heading}</h2>
+            <h2 id="settings-dialog-title" className="text-sm font-semibold text-foreground">
+              {t.settings.heading}
+            </h2>
           </div>
           {visibleNavItems.map((item) => (
             <button
@@ -244,6 +262,7 @@ export function SettingsDialog({ open, onClose }: SettingsDialogProps) {
             type="button"
             onClick={onClose}
             className="absolute top-3 right-3 p-1.5 rounded-lg hover:bg-muted transition-colors text-muted-foreground hover:text-foreground"
+            aria-label={t.a11y.closeSettings}
           >
             <X className="h-4 w-4" />
           </button>
@@ -426,6 +445,7 @@ function GeneralSection() {
         <select
           value={defaultToolView}
           onChange={(e) => setDefaultToolView(e.target.value)}
+          aria-label={t.settings.general.defaultToolViewLabel}
           className="px-3 py-1.5 rounded-lg border border-border bg-background text-sm text-foreground"
         >
           <option value="sidebar">{t.settings.general.sidebarOption}</option>
@@ -440,6 +460,7 @@ function GeneralSection() {
         <select
           value={locale}
           onChange={(e) => setLocale(e.target.value)}
+          aria-label={t.settings.system.languageLabel}
           className="px-3 py-1.5 rounded-lg border border-border bg-background text-sm text-foreground"
         >
           {supportedLocales.map((l) => (
@@ -464,7 +485,7 @@ function GeneralSection() {
           disabled={saving}
           className="flex items-center gap-2 px-4 py-2 rounded-lg bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
         >
-          {saving && <Loader2 className="h-3.5 w-3.5 animate-spin" />}
+          {saving && <Loader2 className="h-3.5 w-3.5 animate-spin" aria-hidden="true" />}
           {t.settings.general.saveButton}
         </button>
         {saveMsg && (
@@ -553,6 +574,7 @@ function SystemSection() {
           type="number"
           value={settings.fileUploadLimitMb || "100"}
           onChange={(e) => updateSetting("fileUploadLimitMb", e.target.value)}
+          aria-label={t.settings.system.fileUploadLimitLabel}
           className="px-3 py-1.5 rounded-lg border border-border bg-background text-sm text-foreground w-24"
           min={1}
         />
@@ -565,6 +587,7 @@ function SystemSection() {
         <select
           value={settings.defaultTheme || "system"}
           onChange={(e) => updateSetting("defaultTheme", e.target.value)}
+          aria-label={t.settings.system.defaultThemeLabel}
           className="px-3 py-1.5 rounded-lg border border-border bg-background text-sm text-foreground"
         >
           <option value="light">{t.settings.system.lightOption}</option>
@@ -580,6 +603,7 @@ function SystemSection() {
         <select
           value={settings.defaultLocale || "en"}
           onChange={(e) => updateSetting("defaultLocale", e.target.value)}
+          aria-label={t.settings.system.languageLabel}
           className="px-3 py-1.5 rounded-lg border border-border bg-background text-sm text-foreground"
         >
           {SUPPORTED_LOCALES.map((l) => (
@@ -598,6 +622,7 @@ function SystemSection() {
           type="number"
           value={settings.loginAttemptLimit || "5"}
           onChange={(e) => updateSetting("loginAttemptLimit", e.target.value)}
+          aria-label={t.settings.system.loginAttemptLimitLabel}
           className="px-3 py-1.5 rounded-lg border border-border bg-background text-sm text-foreground w-24"
           min={1}
           max={100}
@@ -617,6 +642,7 @@ function SystemSection() {
           type="number"
           value={settings.tempFileMaxAgeHours || "24"}
           onChange={(e) => updateSetting("tempFileMaxAgeHours", e.target.value)}
+          aria-label={t.settings.fileManagement.maxAge}
           className="px-3 py-1.5 rounded-lg border border-border bg-background text-sm text-foreground w-24"
           min={1}
         />
@@ -627,6 +653,9 @@ function SystemSection() {
       >
         <button
           type="button"
+          role="switch"
+          aria-checked={settings.startupCleanup !== "false"}
+          aria-label={t.settings.fileManagement.startupCleanup}
           onClick={() =>
             updateSetting("startupCleanup", settings.startupCleanup === "false" ? "true" : "false")
           }
@@ -651,7 +680,7 @@ function SystemSection() {
           disabled={saving}
           className="flex items-center gap-2 px-4 py-2 rounded-lg bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
         >
-          {saving && <Loader2 className="h-3.5 w-3.5 animate-spin" />}
+          {saving && <Loader2 className="h-3.5 w-3.5 animate-spin" aria-hidden="true" />}
           {t.settings.system.saveButton}
         </button>
         {saveMsg && (
@@ -731,13 +760,19 @@ function SecuritySection() {
 
         <div className="space-y-3 max-w-sm">
           <div className="relative">
+            <label htmlFor="current-password" className="sr-only">
+              {t.settings.security.currentPasswordPlaceholder}
+            </label>
             <input
+              id="current-password"
               type={showCurrent ? "text" : "password"}
               value={currentPassword}
               onChange={(e) => setCurrentPassword(e.target.value)}
               placeholder={t.settings.security.currentPasswordPlaceholder}
               className="w-full px-3 py-2 pe-10 rounded-lg border border-border bg-background text-sm text-foreground"
               required
+              aria-invalid={message?.type === "error" || undefined}
+              aria-describedby={message ? "password-change-error" : undefined}
             />
             <button
               type="button"
@@ -749,13 +784,19 @@ function SecuritySection() {
           </div>
 
           <div className="relative">
+            <label htmlFor="new-password" className="sr-only">
+              {t.settings.security.newPasswordPlaceholder}
+            </label>
             <input
+              id="new-password"
               type={showNew ? "text" : "password"}
               value={newPassword}
               onChange={(e) => setNewPassword(e.target.value)}
               placeholder={t.settings.security.newPasswordPlaceholder}
               className="w-full px-3 py-2 pe-10 rounded-lg border border-border bg-background text-sm text-foreground"
               required
+              aria-invalid={message?.type === "error" || undefined}
+              aria-describedby={message ? "password-change-error" : undefined}
             />
             <button
               type="button"
@@ -767,13 +808,19 @@ function SecuritySection() {
           </div>
 
           <div className="relative">
+            <label htmlFor="confirm-password" className="sr-only">
+              {t.settings.security.confirmPasswordPlaceholder}
+            </label>
             <input
+              id="confirm-password"
               type={showConfirm ? "text" : "password"}
               value={confirmPassword}
               onChange={(e) => setConfirmPassword(e.target.value)}
               placeholder={t.settings.security.confirmPasswordPlaceholder}
               className="w-full px-3 py-2 pe-10 rounded-lg border border-border bg-background text-sm text-foreground"
               required
+              aria-invalid={message?.type === "error" || undefined}
+              aria-describedby={message ? "password-change-error" : undefined}
             />
             <button
               type="button"
@@ -787,6 +834,8 @@ function SecuritySection() {
 
           {message && (
             <p
+              id="password-change-error"
+              role="alert"
               className={cn(
                 "text-sm",
                 message.type === "error"
@@ -803,7 +852,7 @@ function SecuritySection() {
             disabled={submitting}
             className="flex items-center gap-2 px-4 py-2 rounded-lg bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
           >
-            {submitting && <Loader2 className="h-3.5 w-3.5 animate-spin" />}
+            {submitting && <Loader2 className="h-3.5 w-3.5 animate-spin" aria-hidden="true" />}
             {t.settings.security.changePasswordButton}
           </button>
         </div>
@@ -1098,16 +1147,26 @@ function PeopleSection() {
             {t.settings.people.newMemberHeading}
           </h4>
           <div className="grid grid-cols-1 sm:grid-cols-2 gap-3">
-            <input
-              type="text"
-              value={newUsername}
-              onChange={(e) => setNewUsername(e.target.value)}
-              placeholder={t.settings.people.usernamePlaceholder}
-              required
-              className="px-3 py-2 rounded-lg border border-border bg-background text-sm text-foreground"
-            />
-            <div className="flex items-center gap-1.5">
+            <div>
+              <label htmlFor="new-user-username" className="sr-only">
+                {t.settings.people.usernamePlaceholder}
+              </label>
               <input
+                id="new-user-username"
+                type="text"
+                value={newUsername}
+                onChange={(e) => setNewUsername(e.target.value)}
+                placeholder={t.settings.people.usernamePlaceholder}
+                required
+                className="w-full px-3 py-2 rounded-lg border border-border bg-background text-sm text-foreground"
+              />
+            </div>
+            <div className="flex items-center gap-1.5">
+              <label htmlFor="new-user-password" className="sr-only">
+                {t.auth.password}
+              </label>
+              <input
+                id="new-user-password"
                 type={showGeneratedPw ? "text" : "password"}
                 value={newPassword}
                 onChange={(e) => {
@@ -1188,7 +1247,7 @@ function PeopleSection() {
               disabled={adding || atLimit}
               className="flex items-center gap-2 px-4 py-2 rounded-lg bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
             >
-              {adding && <Loader2 className="h-3.5 w-3.5 animate-spin" />}
+              {adding && <Loader2 className="h-3.5 w-3.5 animate-spin" aria-hidden="true" />}
               {t.common.create}
             </button>
             <button
@@ -1223,7 +1282,11 @@ function PeopleSection() {
               {t.settings.people.copyPasswordWarning}
             </p>
           )}
-          {addError && <p className="text-sm text-destructive">{addError}</p>}
+          {addError && (
+            <p role="alert" className="text-sm text-destructive">
+              {addError}
+            </p>
+          )}
         </form>
       )}
 
@@ -1440,6 +1503,7 @@ function PeopleSection() {
                   }}
                   className="p-1.5 rounded-lg hover:bg-muted text-muted-foreground hover:text-foreground transition-colors"
                   title="Actions"
+                  aria-label={t.common.actions}
                 >
                   <MoreVertical className="h-4 w-4" />
                 </button>
@@ -1595,6 +1659,7 @@ function ApiKeysSection() {
           value={keyName}
           onChange={(e) => setKeyName(e.target.value)}
           placeholder={t.settings.apiKeys.keyNamePlaceholder}
+          aria-label={t.settings.apiKeys.keyNamePlaceholder}
           className="px-3 py-2 rounded-lg border border-border bg-background text-sm text-foreground w-48"
         />
         <button
@@ -1603,7 +1668,11 @@ function ApiKeysSection() {
           disabled={generating}
           className="flex items-center gap-2 px-4 py-2 rounded-lg bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
         >
-          {generating ? <Loader2 className="h-4 w-4 animate-spin" /> : <Key className="h-4 w-4" />}
+          {generating ? (
+            <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />
+          ) : (
+            <Key className="h-4 w-4" aria-hidden="true" />
+          )}
           {t.settings.apiKeys.generateButton}
         </button>
       </div>
@@ -1678,6 +1747,7 @@ function ApiKeysSection() {
               onClick={() => copyKey(newKey)}
               className="p-2 rounded-lg hover:bg-muted transition-colors text-muted-foreground shrink-0"
               title="Copy"
+              aria-label={t.common.copy}
             >
               {copied ? <Check className="h-4 w-4 text-green-500" /> : <Copy className="h-4 w-4" />}
             </button>
@@ -1718,6 +1788,7 @@ function ApiKeysSection() {
                 onClick={() => deleteKey(k.id)}
                 className="p-1.5 rounded-lg hover:bg-destructive/10 text-muted-foreground hover:text-destructive transition-colors"
                 title="Delete key"
+                aria-label={t.a11y.deleteKey}
               >
                 <Trash2 className="h-4 w-4" />
               </button>
@@ -1895,7 +1966,7 @@ function TeamsSection() {
               disabled={creating}
               className="flex items-center gap-2 px-4 py-2 rounded-lg bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
             >
-              {creating && <Loader2 className="h-3.5 w-3.5 animate-spin" />}
+              {creating && <Loader2 className="h-3.5 w-3.5 animate-spin" aria-hidden="true" />}
               {t.common.create}
             </button>
             <button
@@ -2359,6 +2430,7 @@ function RolesSection() {
                       }}
                       className="p-1.5 rounded-lg hover:bg-muted text-muted-foreground hover:text-foreground transition-colors"
                       title="Edit role"
+                      aria-label={t.a11y.editRole}
                     >
                       <Pencil className="h-4 w-4" />
                     </button>
@@ -2367,6 +2439,7 @@ function RolesSection() {
                       onClick={() => handleDelete(role)}
                       className="p-1.5 rounded-lg hover:bg-destructive/10 text-muted-foreground hover:text-destructive transition-colors"
                       title="Delete role"
+                      aria-label={t.a11y.deleteRole}
                     >
                       <Trash2 className="h-4 w-4" />
                     </button>
@@ -2740,6 +2813,9 @@ function ToolsSection() {
                     </div>
                     <button
                       type="button"
+                      role="switch"
+                      aria-checked={!isDisabled}
+                      aria-label={getToolName(t, tool.id, tool.name)}
                       onClick={() => toggleTool(tool.id)}
                       className={cn(
                         "w-11 h-6 rounded-full transition-colors relative shrink-0 ms-3",
@@ -2780,7 +2856,7 @@ function ToolsSection() {
           disabled={saving || loadFailed}
           className="flex items-center gap-2 px-4 py-2 rounded-lg bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
         >
-          {saving && <Loader2 className="h-3.5 w-3.5 animate-spin" />}
+          {saving && <Loader2 className="h-3.5 w-3.5 animate-spin" aria-hidden="true" />}
           {t.settings.tools.saveButton}
         </button>
         <span className="text-xs text-muted-foreground">
@@ -2825,6 +2901,9 @@ function AnalyticsSection() {
           </span>
           <button
             type="button"
+            role="switch"
+            aria-checked={enabled}
+            aria-label={t.analytics.settingsTitle}
             onClick={() => toggleAnalytics(!enabled)}
             className={cn(
               "relative inline-flex h-6 w-11 items-center rounded-full transition-colors",
diff --git a/apps/web/src/components/tools/barcode-read-settings.tsx b/apps/web/src/components/tools/barcode-read-settings.tsx
index 8a2e46a9..4d3e6f67 100644
--- a/apps/web/src/components/tools/barcode-read-settings.tsx
+++ b/apps/web/src/components/tools/barcode-read-settings.tsx
@@ -56,7 +56,7 @@ function getBadgeColor(type: string): string {
 
 function SectionLabel({ children }: { children: React.ReactNode }) {
   return (
-    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 pt-1">
+    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground pt-1">
       {children}
     </p>
   );
@@ -260,7 +260,7 @@ export function BarcodeReadSettings() {
         <span className="text-sm text-muted-foreground">Thorough scan</span>
         <span
           title="Spends more time analyzing the image. Enable for small, damaged, or low-contrast barcodes."
-          className="inline-flex items-center justify-center w-4 h-4 rounded-full border border-muted-foreground/40 text-muted-foreground/60 text-[10px] cursor-help"
+          className="inline-flex items-center justify-center w-4 h-4 rounded-full border border-muted-foreground/40 text-muted-foreground text-[10px] cursor-help"
         >
           ?
         </span>
@@ -335,7 +335,7 @@ export function BarcodeReadSettings() {
               )}
 
               {fileResult.barcodes.length === 0 ? (
-                <p className="text-xs text-muted-foreground/60 italic py-1">No barcodes found</p>
+                <p className="text-xs text-muted-foreground italic py-1">No barcodes found</p>
               ) : (
                 fileResult.barcodes.map((barcode) => {
                   const idx = globalIndex++;
diff --git a/apps/web/src/components/tools/bulk-rename-settings.tsx b/apps/web/src/components/tools/bulk-rename-settings.tsx
index 6d5594e0..e60062f2 100644
--- a/apps/web/src/components/tools/bulk-rename-settings.tsx
+++ b/apps/web/src/components/tools/bulk-rename-settings.tsx
@@ -128,7 +128,7 @@ export function BulkRenameSettings() {
         disabled={!hasFiles || processing || !pattern}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {processing
           ? t.toolSettings["bulk-rename"].renaming
           : format(t.toolSettings["bulk-rename"].submit, { count: files.length })}
diff --git a/apps/web/src/components/tools/collage-preview.tsx b/apps/web/src/components/tools/collage-preview.tsx
index c6e824a1..e16c0046 100644
--- a/apps/web/src/components/tools/collage-preview.tsx
+++ b/apps/web/src/components/tools/collage-preview.tsx
@@ -83,6 +83,7 @@ export function CollagePreview() {
 
 /** Dropzone for initial image upload. */
 function UploadArea() {
+  const { t } = useTranslation();
   const addImages = useCollageStore((s) => s.addImages);
   const [isDragging, setIsDragging] = useState(false);
 
@@ -118,7 +119,7 @@ function UploadArea() {
 
   return (
     <section
-      aria-label="File drop zone"
+      aria-label={t.a11y.fileDropZone}
       onDragEnter={handleDrag}
       onDragOver={handleDrag}
       onDragLeave={handleDrag}
@@ -322,6 +323,7 @@ function CollageCell({
   gridRow: string;
   backgroundColor: string;
 }) {
+  const { t } = useTranslation();
   const store = useCollageStore();
   const cellRef = useRef<HTMLDivElement>(null);
   const [controlsVisible, setControlsVisible] = useState(false);
@@ -507,7 +509,7 @@ function CollageCell({
       {isSelected && image && !isLoading && (
         <div
           role="toolbar"
-          aria-label="Image controls"
+          aria-label={t.a11y.imageControls}
           className="absolute top-1.5 right-1.5 flex items-center gap-1"
           onClick={(e) => e.stopPropagation()}
           onDoubleClick={(e) => e.stopPropagation()}
@@ -541,7 +543,7 @@ function CollageCell({
             ref={setDragRef}
             {...listeners}
             {...attributes}
-            aria-label="Drag to reorder"
+            aria-label={t.a11y.dragToReorder}
             className="bg-black/50 backdrop-blur-sm text-white rounded p-1 cursor-grab active:cursor-grabbing hover:bg-black/70 transition-colors"
           >
             <GripVertical className="h-3.5 w-3.5" />
@@ -553,7 +555,7 @@ function CollageCell({
       {isSelected && image && !isLoading && (
         <div
           role="toolbar"
-          aria-label="Zoom controls"
+          aria-label={t.a11y.zoomControls}
           className={cn(
             "absolute bottom-0 left-0 right-0 flex items-center gap-2 px-3 py-2 bg-black/50 backdrop-blur-sm transition-opacity duration-300",
             controlsVisible ? "opacity-100" : "opacity-0",
diff --git a/apps/web/src/components/tools/collage-settings.tsx b/apps/web/src/components/tools/collage-settings.tsx
index d674d958..3add28d0 100644
--- a/apps/web/src/components/tools/collage-settings.tsx
+++ b/apps/web/src/components/tools/collage-settings.tsx
@@ -373,7 +373,7 @@ export function CollageSettings() {
         disabled={!hasImages || phase === "processing"}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {phase === "processing" && <Loader2 className="h-4 w-4 animate-spin" />}
+        {phase === "processing" && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {phase === "processing" ? "Creating..." : `Create Collage (${imageCount} images)`}
       </button>
 
diff --git a/apps/web/src/components/tools/color-palette-settings.tsx b/apps/web/src/components/tools/color-palette-settings.tsx
index 2af9cd3f..13e0cb3d 100644
--- a/apps/web/src/components/tools/color-palette-settings.tsx
+++ b/apps/web/src/components/tools/color-palette-settings.tsx
@@ -61,7 +61,7 @@ export function ColorPaletteSettings() {
         disabled={!hasFile || processing}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {processing ? ts.extracting : ts.submit}
       </button>
 
diff --git a/apps/web/src/components/tools/color-settings.tsx b/apps/web/src/components/tools/color-settings.tsx
index 1453f76c..a727fc45 100644
--- a/apps/web/src/components/tools/color-settings.tsx
+++ b/apps/web/src/components/tools/color-settings.tsx
@@ -428,7 +428,7 @@ export function ColorSettings({ toolId, onPreviewFilter }: ColorSettingsProps) {
 
 function SectionLabel({ children }: { children: React.ReactNode }) {
   return (
-    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 pt-1">
+    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground pt-1">
       {children}
     </p>
   );
@@ -457,7 +457,7 @@ function SliderControl({
       <div className="flex justify-between items-center">
         <label htmlFor={id} className={`text-xs ${color || "text-muted-foreground"}`}>
           {label}
-          {hint && <span className="text-[10px] text-muted-foreground/60 ms-1">({hint})</span>}
+          {hint && <span className="text-[10px] text-muted-foreground ms-1">({hint})</span>}
         </label>
         <span className="text-xs font-mono text-foreground tabular-nums w-8 text-end">{value}</span>
       </div>
diff --git a/apps/web/src/components/tools/colorize-settings.tsx b/apps/web/src/components/tools/colorize-settings.tsx
index 9dab9079..e11044a7 100644
--- a/apps/web/src/components/tools/colorize-settings.tsx
+++ b/apps/web/src/components/tools/colorize-settings.tsx
@@ -99,7 +99,7 @@ export function ColorizeSettings() {
           onChange={(e) => setIntensity(Number(e.target.value))}
           className="w-full mt-0.5"
         />
-        <p className="text-[10px] text-muted-foreground/60 mt-0.5">
+        <p className="text-[10px] text-muted-foreground mt-0.5">
           Lower values produce more muted, vintage-style colors.
         </p>
       </div>
@@ -152,7 +152,7 @@ export function ColorizeSettings() {
 
 function SectionLabel({ children }: { children: React.ReactNode }) {
   return (
-    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 pt-1">
+    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground pt-1">
       {children}
     </p>
   );
diff --git a/apps/web/src/components/tools/compare-settings.tsx b/apps/web/src/components/tools/compare-settings.tsx
index 34f8f844..9b38015a 100644
--- a/apps/web/src/components/tools/compare-settings.tsx
+++ b/apps/web/src/components/tools/compare-settings.tsx
@@ -94,7 +94,7 @@ export function CompareSettings() {
         disabled={!hasFile || !secondFile || processing}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {processing ? "Comparing..." : "Compare"}
       </button>
 
diff --git a/apps/web/src/components/tools/compose-settings.tsx b/apps/web/src/components/tools/compose-settings.tsx
index 911251c2..eed84a88 100644
--- a/apps/web/src/components/tools/compose-settings.tsx
+++ b/apps/web/src/components/tools/compose-settings.tsx
@@ -167,7 +167,7 @@ export function ComposeSettings() {
         disabled={!hasFile || !overlayFile || processing}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {processing ? "Processing..." : t.toolSettings.compose.submit}
       </button>
 
diff --git a/apps/web/src/components/tools/enhance-faces-settings.tsx b/apps/web/src/components/tools/enhance-faces-settings.tsx
index 8ee5d994..5d7fbbdd 100644
--- a/apps/web/src/components/tools/enhance-faces-settings.tsx
+++ b/apps/web/src/components/tools/enhance-faces-settings.tsx
@@ -92,7 +92,7 @@ export function EnhanceFacesControls({
           onChange={(e) => setStrength(Number(e.target.value))}
           className="w-full mt-1"
         />
-        <div className="flex justify-between text-[10px] text-muted-foreground/70 mt-0.5">
+        <div className="flex justify-between text-[10px] text-muted-foreground mt-0.5">
           <span>Subtle</span>
           <span>Maximum</span>
         </div>
@@ -110,7 +110,7 @@ export function EnhanceFacesControls({
             />
             <span className="text-sm text-foreground">Only enhance main face</span>
           </label>
-          <p className="text-[11px] text-muted-foreground/70 ms-6 mt-0.5">
+          <p className="text-[11px] text-muted-foreground ms-6 mt-0.5">
             For portraits - ignores background faces
           </p>
         </div>
@@ -133,7 +133,7 @@ export function EnhanceFacesControls({
           onChange={(e) => setSensitivity(Number(e.target.value))}
           className="w-full mt-1"
         />
-        <div className="flex justify-between text-[10px] text-muted-foreground/70 mt-0.5">
+        <div className="flex justify-between text-[10px] text-muted-foreground mt-0.5">
           <span>Fewer faces</span>
           <span>More faces</span>
         </div>
diff --git a/apps/web/src/components/tools/find-duplicates-results.tsx b/apps/web/src/components/tools/find-duplicates-results.tsx
index f1d77249..55a3e460 100644
--- a/apps/web/src/components/tools/find-duplicates-results.tsx
+++ b/apps/web/src/components/tools/find-duplicates-results.tsx
@@ -266,7 +266,7 @@ export function FindDuplicatesResults() {
   if (!results) {
     return (
       <div className="flex flex-col items-center justify-center h-full gap-3 text-center px-4">
-        <Search className="h-10 w-10 text-muted-foreground/50" />
+        <Search className="h-10 w-10 text-muted-foreground" />
         <p className="text-sm text-muted-foreground">
           Choose a detection mode and click "Scan" to find duplicates.
         </p>
diff --git a/apps/web/src/components/tools/find-duplicates-settings.tsx b/apps/web/src/components/tools/find-duplicates-settings.tsx
index 00583c2c..6752992e 100644
--- a/apps/web/src/components/tools/find-duplicates-settings.tsx
+++ b/apps/web/src/components/tools/find-duplicates-settings.tsx
@@ -309,7 +309,7 @@ export function FindDuplicatesSettings() {
             disabled={!hasFiles || scanning}
             className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
           >
-            {scanning && <Loader2 className="h-4 w-4 animate-spin" />}
+            {scanning && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
             {scanning
               ? uploadProgress < 100
                 ? `Uploading... ${uploadProgress}%`
diff --git a/apps/web/src/components/tools/html-to-image-settings.tsx b/apps/web/src/components/tools/html-to-image-settings.tsx
index b9ee06b2..c4737402 100644
--- a/apps/web/src/components/tools/html-to-image-settings.tsx
+++ b/apps/web/src/components/tools/html-to-image-settings.tsx
@@ -175,7 +175,7 @@ export function HtmlToImageSettings() {
         disabled={(store.mode === "url" ? !store.url : !store.htmlContent) || store.capturing}
         className="inline-flex w-full items-center justify-center gap-2 rounded-lg bg-primary px-4 py-2.5 text-sm font-medium text-primary-foreground disabled:opacity-50"
       >
-        {store.capturing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {store.capturing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {store.capturing ? ts.capturing : ts.submit}
       </button>
     </form>
diff --git a/apps/web/src/components/tools/image-enhancement-settings.tsx b/apps/web/src/components/tools/image-enhancement-settings.tsx
index 648c5897..0861c124 100644
--- a/apps/web/src/components/tools/image-enhancement-settings.tsx
+++ b/apps/web/src/components/tools/image-enhancement-settings.tsx
@@ -285,7 +285,7 @@ export function ImageEnhancementControls({
       )}
 
       {/* Mode selector */}
-      <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70">
+      <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
         {t.toolSettings.imageEnhancement.enhancementMode}
       </p>
       <div className="grid grid-cols-3 gap-1">
@@ -309,7 +309,7 @@ export function ImageEnhancementControls({
       {/* Intensity slider */}
       <div className="pt-1">
         <div className="flex justify-between items-center">
-          <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70">
+          <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
             {t.toolSettings.imageEnhancement.intensity}
           </p>
           <span className="text-xs font-mono text-foreground tabular-nums">{intensity}%</span>
@@ -337,6 +337,8 @@ export function ImageEnhancementControls({
         </div>
         <button
           type="button"
+          role="switch"
+          aria-checked={deepEnhance}
           onClick={() => setDeepEnhance(!deepEnhance)}
           className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${
             deepEnhance ? "bg-primary" : "bg-muted"
@@ -360,7 +362,7 @@ export function ImageEnhancementControls({
 
       {analysis && !analyzing && (
         <div className="space-y-2">
-          <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70">
+          <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
             {t.toolSettings.imageEnhancement.detectedIssues}
           </p>
           {analysis.issues.length === 0 ? (
@@ -412,7 +414,7 @@ export function ImageEnhancementControls({
                     style={{ width: `${score}%` }}
                   />
                 </div>
-                <span className="text-[10px] text-muted-foreground/60 w-10 shrink-0">{label}</span>
+                <span className="text-[10px] text-muted-foreground w-10 shrink-0">{label}</span>
               </div>
             ))}
           </div>
diff --git a/apps/web/src/components/tools/image-to-base64-settings.tsx b/apps/web/src/components/tools/image-to-base64-settings.tsx
index c7bc2884..979d2fc3 100644
--- a/apps/web/src/components/tools/image-to-base64-settings.tsx
+++ b/apps/web/src/components/tools/image-to-base64-settings.tsx
@@ -84,7 +84,7 @@ export function ImageToBase64Settings() {
       {/* Output Format */}
       <div>
         <span className="text-xs font-medium text-muted-foreground">Output Image Format</span>
-        <p className="text-[10px] text-muted-foreground/70 mb-1.5">
+        <p className="text-[10px] text-muted-foreground mb-1.5">
           Convert before encoding to control MIME type and size
         </p>
         <div className="flex flex-wrap gap-1.5">
@@ -123,9 +123,7 @@ export function ImageToBase64Settings() {
             onChange={(e) => setQuality(Number(e.target.value))}
             className="w-full mt-1 accent-primary"
           />
-          <p className="text-[10px] text-muted-foreground/70">
-            Lower quality = smaller base64 string
-          </p>
+          <p className="text-[10px] text-muted-foreground">Lower quality = smaller base64 string</p>
         </div>
       )}
 
@@ -141,7 +139,7 @@ export function ImageToBase64Settings() {
           value={maxWidth}
           onChange={(e) => setMaxWidth(Math.max(0, Number(e.target.value)))}
           placeholder="0 = no limit"
-          className="mt-1 w-full rounded bg-muted px-3 py-1.5 text-xs text-foreground placeholder:text-muted-foreground/50 outline-none"
+          className="mt-1 w-full rounded bg-muted px-3 py-1.5 text-xs text-foreground placeholder:text-muted-foreground outline-none"
         />
       </div>
 
@@ -157,9 +155,9 @@ export function ImageToBase64Settings() {
           value={maxHeight}
           onChange={(e) => setMaxHeight(Math.max(0, Number(e.target.value)))}
           placeholder="0 = no limit"
-          className="mt-1 w-full rounded bg-muted px-3 py-1.5 text-xs text-foreground placeholder:text-muted-foreground/50 outline-none"
+          className="mt-1 w-full rounded bg-muted px-3 py-1.5 text-xs text-foreground placeholder:text-muted-foreground outline-none"
         />
-        <p className="text-[10px] text-muted-foreground/70 mt-0.5">
+        <p className="text-[10px] text-muted-foreground mt-0.5">
           Resize before encoding. Aspect ratio is preserved. 0 = no limit.
         </p>
       </div>
@@ -172,7 +170,7 @@ export function ImageToBase64Settings() {
         disabled={!hasFiles || processing}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {processing
           ? "Converting..."
           : `Convert to Base64${files.length > 1 ? ` (${files.length})` : ""}`}
diff --git a/apps/web/src/components/tools/info-settings.tsx b/apps/web/src/components/tools/info-settings.tsx
index d5ada12f..7af8cfb6 100644
--- a/apps/web/src/components/tools/info-settings.tsx
+++ b/apps/web/src/components/tools/info-settings.tsx
@@ -133,7 +133,7 @@ export function InfoSettings() {
         disabled={!hasFile || processing}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {processing ? ts.reading : ts.readInfo}
       </button>
 
diff --git a/apps/web/src/components/tools/meme-generator-settings.tsx b/apps/web/src/components/tools/meme-generator-settings.tsx
index b7b01c66..f348c282 100644
--- a/apps/web/src/components/tools/meme-generator-settings.tsx
+++ b/apps/web/src/components/tools/meme-generator-settings.tsx
@@ -267,7 +267,7 @@ function EditorSettings() {
       >
         {generating ? (
           <>
-            <Loader2 className="h-4 w-4 animate-spin" />
+            <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />
             Generating...
           </>
         ) : (
diff --git a/apps/web/src/components/tools/ocr-settings.tsx b/apps/web/src/components/tools/ocr-settings.tsx
index 1d4669c1..8492378a 100644
--- a/apps/web/src/components/tools/ocr-settings.tsx
+++ b/apps/web/src/components/tools/ocr-settings.tsx
@@ -34,7 +34,7 @@ const ENHANCE_DEFAULTS: Record<OcrQuality, boolean> = {
 
 function SectionLabel({ children }: { children: React.ReactNode }) {
   return (
-    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 pt-1">
+    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground pt-1">
       {children}
     </p>
   );
@@ -253,7 +253,7 @@ export function OcrSettings() {
         </span>
         <span
           title="Automatically deskews, enhances contrast, removes noise, and upscales the image before scanning for better accuracy."
-          className="inline-flex items-center justify-center w-4 h-4 rounded-full border border-muted-foreground/40 text-muted-foreground/60 text-[10px] cursor-help"
+          className="inline-flex items-center justify-center w-4 h-4 rounded-full border border-muted-foreground/40 text-muted-foreground text-[10px] cursor-help"
         >
           <Info className="h-2.5 w-2.5" />
         </span>
@@ -264,7 +264,7 @@ export function OcrSettings() {
         <button
           type="button"
           onClick={() => setLangOpen(!langOpen)}
-          className="flex items-center gap-1 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 hover:text-foreground w-full pt-1"
+          className="flex items-center gap-1 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground hover:text-foreground w-full pt-1"
         >
           {langOpen ? <ChevronDown className="h-3 w-3" /> : <ChevronRight className="h-3 w-3" />}
           Language
diff --git a/apps/web/src/components/tools/passport-photo-settings.tsx b/apps/web/src/components/tools/passport-photo-settings.tsx
index 4c139232..034ac978 100644
--- a/apps/web/src/components/tools/passport-photo-settings.tsx
+++ b/apps/web/src/components/tools/passport-photo-settings.tsx
@@ -157,7 +157,7 @@ function groupByRegion(): Map<PassportRegion, PassportSpec[]> {
 
 function SectionLabel({ children }: { children: React.ReactNode }) {
   return (
-    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 pt-1">
+    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground pt-1">
       {children}
     </p>
   );
@@ -326,7 +326,7 @@ function CountryOption({
     >
       <span>{spec.flag}</span>
       <span className="flex-1 text-start">{spec.name}</span>
-      <span className="text-muted-foreground/60 tabular-nums text-[10px]">
+      <span className="text-muted-foreground tabular-nums text-[10px]">
         {formatDimensions(doc)}
       </span>
       {selected && <Check className="h-3 w-3 text-primary shrink-0" />}
@@ -656,7 +656,7 @@ export function PassportPhotoSettings() {
                   if (!specs || specs.length === 0) return null;
                   return (
                     <div key={region}>
-                      <p className="px-3 py-1.5 text-[10px] font-semibold uppercase tracking-wider text-muted-foreground/60">
+                      <p className="px-3 py-1.5 text-[10px] font-semibold uppercase tracking-wider text-muted-foreground">
                         {REGION_LABELS[region]}
                       </p>
                       {specs.map((spec) => (
diff --git a/apps/web/src/components/tools/pdf-to-image-settings.tsx b/apps/web/src/components/tools/pdf-to-image-settings.tsx
index 356656ce..7839098d 100644
--- a/apps/web/src/components/tools/pdf-to-image-settings.tsx
+++ b/apps/web/src/components/tools/pdf-to-image-settings.tsx
@@ -207,7 +207,7 @@ export function PdfToImageSettings() {
             className="w-full mt-1.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
           />
         ) : (
-          <p className="text-xs text-muted-foreground/60 mt-1">{DPI_LABELS[store.dpi] ?? ""}</p>
+          <p className="text-xs text-muted-foreground mt-1">{DPI_LABELS[store.dpi] ?? ""}</p>
         )}
       </div>
 
@@ -265,7 +265,7 @@ export function PdfToImageSettings() {
         disabled={!store.file || !store.pageCount || store.processing || selectedCount === 0}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {store.processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {store.processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {store.processing
           ? t.toolSettings["pdf-to-image"].converting
           : `Convert ${selectedCount} page${selectedCount !== 1 ? "s" : ""}`}
diff --git a/apps/web/src/components/tools/remove-bg-settings.tsx b/apps/web/src/components/tools/remove-bg-settings.tsx
index 95a55b1b..a17e65d5 100644
--- a/apps/web/src/components/tools/remove-bg-settings.tsx
+++ b/apps/web/src/components/tools/remove-bg-settings.tsx
@@ -73,7 +73,7 @@ const GRADIENT_PRESETS = [
 
 function SectionLabel({ children }: { children: React.ReactNode }) {
   return (
-    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 pt-1">
+    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground pt-1">
       {children}
     </p>
   );
@@ -425,7 +425,7 @@ export function RemoveBgControls({ settings: _settings, onChange }: RemoveBgCont
       <button
         type="button"
         onClick={() => setEffectsOpen(!effectsOpen)}
-        className="flex items-center gap-1 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 hover:text-foreground w-full pt-1"
+        className="flex items-center gap-1 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground hover:text-foreground w-full pt-1"
       >
         {effectsOpen ? <ChevronDown className="h-3 w-3" /> : <ChevronRight className="h-3 w-3" />}
         Effects
diff --git a/apps/web/src/components/tools/sharpening-settings.tsx b/apps/web/src/components/tools/sharpening-settings.tsx
index 8880add8..b587d38a 100644
--- a/apps/web/src/components/tools/sharpening-settings.tsx
+++ b/apps/web/src/components/tools/sharpening-settings.tsx
@@ -397,7 +397,7 @@ export function SharpeningSettings() {
 
 function SectionLabel({ children }: { children: React.ReactNode }) {
   return (
-    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 pt-1">
+    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground pt-1">
       {children}
     </p>
   );
@@ -429,7 +429,7 @@ function SliderControl({
       <div className="flex justify-between items-center">
         <label htmlFor={id} className={`text-xs ${color || "text-muted-foreground"}`}>
           {label}
-          {hint && <span className="text-[10px] text-muted-foreground/60 ms-1">({hint})</span>}
+          {hint && <span className="text-[10px] text-muted-foreground ms-1">({hint})</span>}
         </label>
         <span className="text-xs font-mono text-foreground tabular-nums w-10 text-end">
           {displayValue}
diff --git a/apps/web/src/components/tools/split-canvas.tsx b/apps/web/src/components/tools/split-canvas.tsx
index 17e03ff7..b1e2085a 100644
--- a/apps/web/src/components/tools/split-canvas.tsx
+++ b/apps/web/src/components/tools/split-canvas.tsx
@@ -81,7 +81,7 @@ export function SplitCanvas() {
       <div className="flex flex-col items-center justify-center h-full gap-3 text-center">
         <Loader2 className="h-8 w-8 text-muted-foreground animate-spin" />
         <p className="text-sm text-muted-foreground">Generating preview...</p>
-        <p className="text-xs text-muted-foreground/60">{filename}</p>
+        <p className="text-xs text-muted-foreground">{filename}</p>
       </div>
     );
   }
@@ -91,7 +91,7 @@ export function SplitCanvas() {
       <div className="flex flex-col items-center justify-center h-full gap-3 text-center p-4">
         <Loader2 className="h-8 w-8 text-muted-foreground animate-spin" />
         <p className="text-sm text-muted-foreground">Loading preview...</p>
-        <p className="text-xs text-muted-foreground/60">{filename}</p>
+        <p className="text-xs text-muted-foreground">{filename}</p>
       </div>
     );
   }
diff --git a/apps/web/src/components/tools/split-settings.tsx b/apps/web/src/components/tools/split-settings.tsx
index 288021c1..9d018dc1 100644
--- a/apps/web/src/components/tools/split-settings.tsx
+++ b/apps/web/src/components/tools/split-settings.tsx
@@ -402,7 +402,7 @@ export function SplitSettings() {
         disabled={!hasFile || processing || fileStoreProcessing}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {processing
           ? "Splitting..."
           : files.length > 1
diff --git a/apps/web/src/components/tools/stitch-settings.tsx b/apps/web/src/components/tools/stitch-settings.tsx
index 76faffb6..8eae1992 100644
--- a/apps/web/src/components/tools/stitch-settings.tsx
+++ b/apps/web/src/components/tools/stitch-settings.tsx
@@ -321,7 +321,7 @@ export function StitchSettings() {
         disabled={!hasEnoughFiles || processing}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {processing
           ? uploadProgress < 100
             ? `Uploading... ${uploadProgress}%`
diff --git a/apps/web/src/components/tools/svg-to-raster-settings.tsx b/apps/web/src/components/tools/svg-to-raster-settings.tsx
index d90bfe76..a816e6fc 100644
--- a/apps/web/src/components/tools/svg-to-raster-settings.tsx
+++ b/apps/web/src/components/tools/svg-to-raster-settings.tsx
@@ -1,6 +1,7 @@
 import { Download } from "lucide-react";
 import { useEffect, useState } from "react";
 import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
 import { useToolProcessor } from "@/hooks/use-tool-processor";
 import { useFileStore } from "@/stores/file-store";
 
@@ -48,6 +49,7 @@ function parseSvgDimensions(file: File): Promise<SvgDims | null> {
 }
 
 export function SvgToRasterSettings() {
+  const { t } = useTranslation();
   const { files } = useFileStore();
   const { processFiles, processAllFiles, processing, error, downloadUrl, progress } =
     useToolProcessor("svg-to-raster");
@@ -322,13 +324,13 @@ export function SvgToRasterSettings() {
             type="button"
             onClick={() => setBgColor("#ffffff")}
             className={`w-8 h-8 rounded border-2 bg-white ${bgColor === "#ffffff" ? "border-primary" : "border-border"}`}
-            aria-label="White background"
+            aria-label={t.a11y.whiteBackground}
           />
           <button
             type="button"
             onClick={() => setBgColor("#000000")}
             className={`w-8 h-8 rounded border-2 bg-black ${bgColor === "#000000" ? "border-primary" : "border-border"}`}
-            aria-label="Black background"
+            aria-label={t.a11y.blackBackground}
           />
           <input
             type="color"
diff --git a/apps/web/src/components/tools/transparency-fixer-settings.tsx b/apps/web/src/components/tools/transparency-fixer-settings.tsx
index d5f26a0a..3aead72a 100644
--- a/apps/web/src/components/tools/transparency-fixer-settings.tsx
+++ b/apps/web/src/components/tools/transparency-fixer-settings.tsx
@@ -53,8 +53,9 @@ export function TransparencyFixerControls({
         </div>
         <button
           type="button"
+          role="switch"
           data-testid="remove-watermark-toggle"
-          aria-pressed={removeWatermark}
+          aria-checked={removeWatermark}
           onClick={() => setRemoveWatermark(!removeWatermark)}
           className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${
             removeWatermark ? "bg-primary" : "bg-muted"
@@ -72,7 +73,7 @@ export function TransparencyFixerControls({
       <button
         type="button"
         onClick={() => setAdvancedOpen(!advancedOpen)}
-        className="flex items-center gap-1 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 hover:text-foreground w-full pt-1"
+        className="flex items-center gap-1 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground hover:text-foreground w-full pt-1"
       >
         {advancedOpen ? <ChevronDown className="h-3 w-3" /> : <ChevronRight className="h-3 w-3" />}
         Advanced
@@ -100,7 +101,7 @@ export function TransparencyFixerControls({
 
           {/* Output Format dropdown */}
           <div>
-            <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground/70 mb-1">
+            <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground mb-1">
               Output Format
             </p>
             <select
diff --git a/apps/web/src/components/tools/upscale-settings.tsx b/apps/web/src/components/tools/upscale-settings.tsx
index 5752c17c..c0d2aa25 100644
--- a/apps/web/src/components/tools/upscale-settings.tsx
+++ b/apps/web/src/components/tools/upscale-settings.tsx
@@ -158,7 +158,7 @@ export function UpscaleControls({ settings: initialSettings, onChange }: Upscale
           onChange={(e) => setDenoise(Number(e.target.value))}
           className="w-full mt-1"
         />
-        <p className="text-[11px] text-muted-foreground/70 mt-1">
+        <p className="text-[11px] text-muted-foreground mt-1">
           Smooths out grain and noise. Higher values remove more noise but may soften details.
         </p>
       </div>
diff --git a/apps/web/src/components/tools/vectorize-settings.tsx b/apps/web/src/components/tools/vectorize-settings.tsx
index 97164e3d..baef30a0 100644
--- a/apps/web/src/components/tools/vectorize-settings.tsx
+++ b/apps/web/src/components/tools/vectorize-settings.tsx
@@ -329,6 +329,9 @@ export function VectorizeSettings() {
         <span className="text-xs text-muted-foreground">Invert Colors</span>
         <button
           type="button"
+          role="switch"
+          aria-checked={invert}
+          aria-label={t.toolSettings.vectorize.invertColors}
           onClick={() => updateSetting(setInvert)(!invert)}
           className={`w-9 h-5 rounded-full transition-colors ${invert ? "bg-primary" : "bg-muted"}`}
         >
diff --git a/apps/web/src/components/tools/watermark-image-settings.tsx b/apps/web/src/components/tools/watermark-image-settings.tsx
index 5062f94a..b3c09617 100644
--- a/apps/web/src/components/tools/watermark-image-settings.tsx
+++ b/apps/web/src/components/tools/watermark-image-settings.tsx
@@ -197,7 +197,7 @@ export function WatermarkImageSettings() {
         disabled={!hasFile || !watermarkFile || processing}
         className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
       >
-        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing && <Loader2 className="h-4 w-4 animate-spin" aria-hidden="true" />}
         {processing
           ? "Processing..."
           : files.length > 1
diff --git a/apps/web/src/hooks/use-focus-trap.ts b/apps/web/src/hooks/use-focus-trap.ts
new file mode 100644
index 00000000..3e13ecde
--- /dev/null
+++ b/apps/web/src/hooks/use-focus-trap.ts
@@ -0,0 +1,75 @@
+import { useEffect, useRef } from "react";
+
+const FOCUSABLE_SELECTOR = [
+  "a[href]",
+  "button:not([disabled])",
+  "input:not([disabled])",
+  "select:not([disabled])",
+  "textarea:not([disabled])",
+  "[tabindex]:not([tabindex='-1'])",
+].join(", ");
+
+export function useFocusTrap(containerRef: React.RefObject<HTMLElement | null>, active: boolean) {
+  const returnFocusRef = useRef<HTMLElement | null>(null);
+
+  useEffect(() => {
+    if (!active || !containerRef.current) return;
+
+    returnFocusRef.current = document.activeElement as HTMLElement;
+    const container = containerRef.current;
+
+    const getFocusableElements = () =>
+      Array.from(container.querySelectorAll<HTMLElement>(FOCUSABLE_SELECTOR)).filter(
+        (el) => !el.closest("[aria-hidden='true']"),
+      );
+
+    const focusFirst = () => {
+      const elements = getFocusableElements();
+      if (elements.length > 0) {
+        elements[0].focus();
+      }
+    };
+
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key !== "Tab") return;
+
+      const elements = getFocusableElements();
+      if (elements.length === 0) return;
+
+      const first = elements[0];
+      const last = elements[elements.length - 1];
+
+      if (e.shiftKey) {
+        if (document.activeElement === first) {
+          e.preventDefault();
+          last.focus();
+        }
+      } else {
+        if (document.activeElement === last) {
+          e.preventDefault();
+          first.focus();
+        }
+      }
+    };
+
+    const observer = new MutationObserver(() => {
+      const elements = getFocusableElements();
+      if (elements.length > 0 && !container.contains(document.activeElement)) {
+        elements[0].focus();
+      }
+    });
+
+    observer.observe(container, { childList: true, subtree: true });
+    container.addEventListener("keydown", handleKeyDown);
+
+    requestAnimationFrame(focusFirst);
+
+    return () => {
+      container.removeEventListener("keydown", handleKeyDown);
+      observer.disconnect();
+      if (returnFocusRef.current && returnFocusRef.current.isConnected) {
+        returnFocusRef.current.focus();
+      }
+    };
+  }, [active, containerRef]);
+}
diff --git a/apps/web/src/pages/analytics-consent-page.tsx b/apps/web/src/pages/analytics-consent-page.tsx
index f82514fe..4187f811 100644
--- a/apps/web/src/pages/analytics-consent-page.tsx
+++ b/apps/web/src/pages/analytics-consent-page.tsx
@@ -54,9 +54,7 @@ export function AnalyticsConsentPage() {
           </p>
         </div>
 
-        <p className="text-center text-xs text-muted-foreground/60">
-          {t.analytics.consentChangeable}
-        </p>
+        <p className="text-center text-xs text-muted-foreground">{t.analytics.consentChangeable}</p>
 
         <div className="flex gap-2.5">
           <button
diff --git a/apps/web/src/pages/automate-page.tsx b/apps/web/src/pages/automate-page.tsx
index 6a4bbf5f..a81decc0 100644
--- a/apps/web/src/pages/automate-page.tsx
+++ b/apps/web/src/pages/automate-page.tsx
@@ -910,7 +910,7 @@ export function AutomatePage() {
               {/* Preview content */}
               {!previewCollapsed && (
                 <section
-                  aria-label="Image area"
+                  aria-label={t.a11y.imageArea}
                   className="flex-1 flex flex-col overflow-hidden min-h-0"
                   onKeyDown={hasMultiple ? handleImageKeyDown : undefined}
                   tabIndex={hasMultiple ? 0 : undefined}
@@ -921,7 +921,7 @@ export function AutomatePage() {
                         type="button"
                         onClick={navigatePrev}
                         className="absolute left-3 z-10 w-8 h-8 rounded-full bg-background/80 border border-border shadow-sm flex items-center justify-center hover:bg-background transition-colors"
-                        aria-label="Previous image"
+                        aria-label={t.a11y.previousImage}
                       >
                         <ChevronLeft className="h-4 w-4" />
                       </button>
@@ -931,7 +931,7 @@ export function AutomatePage() {
                         type="button"
                         onClick={navigateNext}
                         className="absolute right-3 z-10 w-8 h-8 rounded-full bg-background/80 border border-border shadow-sm flex items-center justify-center hover:bg-background transition-colors"
-                        aria-label="Next image"
+                        aria-label={t.a11y.nextImage}
                       >
                         <ChevronRight className="h-4 w-4" />
                       </button>
diff --git a/apps/web/src/pages/editor-page.tsx b/apps/web/src/pages/editor-page.tsx
index 3884333e..983a8213 100644
--- a/apps/web/src/pages/editor-page.tsx
+++ b/apps/web/src/pages/editor-page.tsx
@@ -151,6 +151,7 @@ export function EditorPage() {
 
   return (
     <div className="flex flex-col h-screen overflow-hidden bg-background text-foreground">
+      <h1 className="sr-only">{t.editor.welcome.heading}</h1>
       <EditorMenuBar
         onNewDocument={() => setShowNewDocument(true)}
         onOpenImage={handleOpenImage}
diff --git a/apps/web/src/pages/files-page.tsx b/apps/web/src/pages/files-page.tsx
index 174446ac..35a07066 100644
--- a/apps/web/src/pages/files-page.tsx
+++ b/apps/web/src/pages/files-page.tsx
@@ -18,6 +18,7 @@ export function FilesPage() {
   if (isMobile) {
     return (
       <AppLayout showToolPanel={false}>
+        <h1 className="sr-only">{t.files.myFiles}</h1>
         <div className="flex flex-col h-full w-full overflow-hidden">
           {/* Mobile tabs */}
           <div className="flex border-b border-border">
@@ -68,7 +69,7 @@ export function FilesPage() {
             <div
               role="dialog"
               aria-modal="true"
-              aria-label="File Details"
+              aria-label={t.a11y.fileDetails}
               className="fixed inset-0 z-50 bg-black/50"
               onClick={(e) => {
                 if (e.target === e.currentTarget) setShowDetails(false);
@@ -95,6 +96,7 @@ export function FilesPage() {
 
   return (
     <AppLayout showToolPanel={false}>
+      <h1 className="sr-only">{t.files.myFiles}</h1>
       <div className="flex h-full w-full overflow-hidden">
         <FilesNav />
         {activeTab === "recent" ? (
diff --git a/apps/web/src/pages/fullscreen-grid-page.tsx b/apps/web/src/pages/fullscreen-grid-page.tsx
index 7982deed..776f66a3 100644
--- a/apps/web/src/pages/fullscreen-grid-page.tsx
+++ b/apps/web/src/pages/fullscreen-grid-page.tsx
@@ -138,6 +138,7 @@ export function FullscreenGridPage() {
 
       {/* Grid */}
       <main className="max-w-7xl mx-auto px-4 sm:px-6 py-6">
+        <h1 className="sr-only">{t.nav.tools}</h1>
         {activeCategories.length === 0 ? (
           <div className="text-center py-16 text-muted-foreground">
             <Search className="h-12 w-12 mx-auto mb-4 opacity-30" />
diff --git a/apps/web/src/pages/home-page.tsx b/apps/web/src/pages/home-page.tsx
index 1775c15b..76437c54 100644
--- a/apps/web/src/pages/home-page.tsx
+++ b/apps/web/src/pages/home-page.tsx
@@ -99,6 +99,7 @@ export function HomePage() {
   if (isMobile && hasFile) {
     return (
       <AppLayout showToolPanel={false} onFiles={handleFiles}>
+        <h1 className="sr-only">{t.nav.tools}</h1>
         <div className="flex flex-col h-full w-full">
           {/* File info bar */}
           <div className="flex items-center gap-2 px-4 py-3 border-b border-border">
@@ -141,11 +142,25 @@ export function HomePage() {
                     {getToolName(t, tool.id, tool.name)}
                   </span>
                   {status === "not_installed" && (
-                    <Download className="h-3.5 w-3.5 text-muted-foreground" />
+                    <>
+                      <Download className="h-3.5 w-3.5 text-muted-foreground" aria-hidden="true" />
+                      <span className="sr-only">{t.a11y.notInstalled}</span>
+                    </>
+                  )}
+                  {status === "queued" && (
+                    <>
+                      <Clock className="h-3.5 w-3.5 text-muted-foreground" aria-hidden="true" />
+                      <span className="sr-only">{t.a11y.queued}</span>
+                    </>
                   )}
-                  {status === "queued" && <Clock className="h-3.5 w-3.5 text-muted-foreground" />}
                   {status === "installing" && (
-                    <Loader2 className="h-3.5 w-3.5 text-muted-foreground animate-spin" />
+                    <>
+                      <Loader2
+                        className="h-3.5 w-3.5 text-muted-foreground animate-spin"
+                        aria-hidden="true"
+                      />
+                      <span className="sr-only">{t.a11y.installing}</span>
+                    </>
                   )}
                 </button>
               );
@@ -160,7 +175,7 @@ export function HomePage() {
               <div className="flex flex-col items-center justify-center h-full gap-3 text-center">
                 <Loader2 className="h-8 w-8 text-muted-foreground animate-spin" />
                 <p className="text-sm text-muted-foreground">{t.homePage.generatingPreview}</p>
-                <p className="text-xs text-muted-foreground/60">{selectedFileName}</p>
+                <p className="text-xs text-muted-foreground">{selectedFileName}</p>
               </div>
             ) : originalBlobUrl ? (
               <ImageViewer
@@ -182,6 +197,7 @@ export function HomePage() {
   // File uploaded — desktop: tool selector on left, image preview on right
   return (
     <AppLayout showToolPanel={false} onFiles={handleFiles}>
+      <h1 className="sr-only">{t.nav.tools}</h1>
       <div className="flex h-full w-full">
         {/* Left panel: Tool selector */}
         <div className="w-64 lg:w-80 border-r border-border overflow-y-auto shrink-0">
@@ -233,13 +249,31 @@ export function HomePage() {
                       {getToolName(t, tool.id, tool.name)}
                     </span>
                     {status === "not_installed" && (
-                      <Download className="h-3.5 w-3.5 text-muted-foreground ms-auto" />
+                      <>
+                        <Download
+                          className="h-3.5 w-3.5 text-muted-foreground ms-auto"
+                          aria-hidden="true"
+                        />
+                        <span className="sr-only">{t.a11y.notInstalled}</span>
+                      </>
                     )}
                     {status === "queued" && (
-                      <Clock className="h-3.5 w-3.5 text-muted-foreground ms-auto" />
+                      <>
+                        <Clock
+                          className="h-3.5 w-3.5 text-muted-foreground ms-auto"
+                          aria-hidden="true"
+                        />
+                        <span className="sr-only">{t.a11y.queued}</span>
+                      </>
                     )}
                     {status === "installing" && (
-                      <Loader2 className="h-3.5 w-3.5 text-muted-foreground ms-auto animate-spin" />
+                      <>
+                        <Loader2
+                          className="h-3.5 w-3.5 text-muted-foreground ms-auto animate-spin"
+                          aria-hidden="true"
+                        />
+                        <span className="sr-only">{t.a11y.installing}</span>
+                      </>
                     )}
                   </button>
                 );
@@ -279,13 +313,31 @@ export function HomePage() {
                           <Icon className="h-4 w-4 text-muted-foreground shrink-0" />
                           <span className="text-sm">{getToolName(t, tool.id, tool.name)}</span>
                           {status === "not_installed" && (
-                            <Download className="h-3.5 w-3.5 text-muted-foreground ms-auto" />
+                            <>
+                              <Download
+                                className="h-3.5 w-3.5 text-muted-foreground ms-auto"
+                                aria-hidden="true"
+                              />
+                              <span className="sr-only">{t.a11y.notInstalled}</span>
+                            </>
                           )}
                           {status === "queued" && (
-                            <Clock className="h-3.5 w-3.5 text-muted-foreground ms-auto" />
+                            <>
+                              <Clock
+                                className="h-3.5 w-3.5 text-muted-foreground ms-auto"
+                                aria-hidden="true"
+                              />
+                              <span className="sr-only">{t.a11y.queued}</span>
+                            </>
                           )}
                           {status === "installing" && (
-                            <Loader2 className="h-3.5 w-3.5 text-muted-foreground ms-auto animate-spin" />
+                            <>
+                              <Loader2
+                                className="h-3.5 w-3.5 text-muted-foreground ms-auto animate-spin"
+                                aria-hidden="true"
+                              />
+                              <span className="sr-only">{t.a11y.installing}</span>
+                            </>
                           )}
                         </button>
                       );
@@ -305,7 +357,7 @@ export function HomePage() {
             <div className="flex flex-col items-center justify-center h-full gap-3 text-center">
               <Loader2 className="h-8 w-8 text-muted-foreground animate-spin" />
               <p className="text-sm text-muted-foreground">{t.homePage.generatingPreview}</p>
-              <p className="text-xs text-muted-foreground/60">{selectedFileName}</p>
+              <p className="text-xs text-muted-foreground">{selectedFileName}</p>
             </div>
           ) : originalBlobUrl ? (
             <ImageViewer
diff --git a/apps/web/src/pages/login-page.tsx b/apps/web/src/pages/login-page.tsx
index 1fbc9f6a..b98f3864 100644
--- a/apps/web/src/pages/login-page.tsx
+++ b/apps/web/src/pages/login-page.tsx
@@ -38,7 +38,7 @@ function RotatingPhrase() {
 }
 
 function LanguageSelector() {
-  const { locale, setLocale, supportedLocales } = useTranslation();
+  const { t, locale, setLocale, supportedLocales } = useTranslation();
   const [open, setOpen] = useState(false);
   const ref = useRef<HTMLDivElement>(null);
 
@@ -74,7 +74,7 @@ function LanguageSelector() {
           strokeLinecap="round"
           strokeLinejoin="round"
           role="img"
-          aria-label="Language"
+          aria-label={t.a11y.language}
         >
           <circle cx="12" cy="12" r="10" />
           <path d="M12 2a14.5 14.5 0 0 0 0 20 14.5 14.5 0 0 0 0-20" />
@@ -112,7 +112,7 @@ function LanguageSelector() {
                   strokeLinejoin="round"
                   className="text-primary shrink-0"
                   role="img"
-                  aria-label="Selected"
+                  aria-label={t.a11y.selected}
                 >
                   <polyline points="20 6 9 17 4 12" />
                 </svg>
diff --git a/apps/web/src/pages/tool-page.tsx b/apps/web/src/pages/tool-page.tsx
index 2e2498c6..c33ac3fb 100644
--- a/apps/web/src/pages/tool-page.tsx
+++ b/apps/web/src/pages/tool-page.tsx
@@ -27,6 +27,7 @@ import { useTranslation } from "@/contexts/i18n-context";
 import { useAuth } from "@/hooks/use-auth";
 import { useMobile } from "@/hooks/use-mobile";
 import { formatFileSize } from "@/lib/download";
+import { format } from "@/lib/format";
 import { ICON_MAP } from "@/lib/icon-map";
 import { getToolName } from "@/lib/tool-i18n";
 import { getToolRegistryEntry } from "@/lib/tool-registry";
@@ -117,7 +118,7 @@ function FileSelectionInfo({
             >
               {isSelected && <CheckCircle2 className="h-3 w-3 text-primary shrink-0" />}
               <span className="truncate flex-1 min-w-0">{file.name}</span>
-              <span className="shrink-0 text-[10px] text-muted-foreground/70">
+              <span className="shrink-0 text-[10px] text-muted-foreground">
                 {getFileFormat(file.name)}
               </span>
               <span className="shrink-0 text-[10px] tabular-nums">{formatFileSize(file.size)}</span>
@@ -203,6 +204,13 @@ export function ToolPage() {
   const hasPrev = selectedIndex > 0;
   const hasNext = selectedIndex < entries.length - 1;
 
+  const liveMessage = useMemo(() => {
+    if (!currentEntry) return "";
+    if (currentEntry.status === "completed" && processedUrl) return t.a11y.processingComplete;
+    if (currentEntry.status === "failed") return t.a11y.processingFailed;
+    return "";
+  }, [currentEntry, processedUrl, t.a11y.processingComplete, t.a11y.processingFailed]);
+
   const handleImageKeyDown = useCallback(
     (e: React.KeyboardEvent) => {
       if (e.key === "ArrowLeft") {
@@ -635,7 +643,7 @@ export function ToolPage() {
         <div className="flex flex-col items-center justify-center h-full gap-3 text-center">
           <Loader2 className="h-8 w-8 text-muted-foreground animate-spin" />
           <p className="text-sm text-muted-foreground">{t.toolPage.generatingPreview}</p>
-          <p className="text-xs text-muted-foreground/60">{selectedFileName}</p>
+          <p className="text-xs text-muted-foreground">{selectedFileName}</p>
         </div>
       );
     }
@@ -706,7 +714,7 @@ export function ToolPage() {
             type="button"
             onClick={navigatePrev}
             className="absolute left-3 z-10 w-8 h-8 rounded-full bg-background/80 border border-border shadow-sm flex items-center justify-center hover:bg-background transition-colors"
-            aria-label="Previous image"
+            aria-label={t.a11y.previousImage}
           >
             <ChevronLeft className="h-4 w-4" />
           </button>
@@ -716,13 +724,20 @@ export function ToolPage() {
             type="button"
             onClick={navigateNext}
             className="absolute right-3 z-10 w-8 h-8 rounded-full bg-background/80 border border-border shadow-sm flex items-center justify-center hover:bg-background transition-colors"
-            aria-label="Next image"
+            aria-label={t.a11y.nextImage}
           >
             <ChevronRight className="h-4 w-4" />
           </button>
         )}
         {hasMultiple && (
-          <div className="absolute top-3 right-3 z-10 bg-background/80 border border-border px-2 py-0.5 rounded-full text-xs text-muted-foreground tabular-nums">
+          <div
+            role="status"
+            aria-label={format(t.a11y.imageNOfTotal, {
+              n: selectedIndex + 1,
+              total: entries.length,
+            })}
+            className="absolute top-3 right-3 z-10 bg-background/80 border border-border px-2 py-0.5 rounded-full text-xs text-muted-foreground tabular-nums"
+          >
             {selectedIndex + 1} / {entries.length}
           </div>
         )}
@@ -796,9 +811,9 @@ export function ToolPage() {
             <div className="p-2 rounded-lg bg-primary text-primary-foreground">
               <IconComponent className="h-5 w-5" />
             </div>
-            <h2 className="font-semibold text-lg text-foreground flex-1">
+            <h1 className="font-semibold text-lg text-foreground flex-1">
               {getToolName(t, tool.id, tool.name)}
-            </h2>
+            </h1>
             <button
               type="button"
               onClick={() => setMobileSettingsOpen(!mobileSettingsOpen)}
@@ -810,11 +825,14 @@ export function ToolPage() {
 
           {/* Main area: image viewer (full height) */}
           <section
-            aria-label="Image area"
+            aria-label={t.a11y.imageArea}
             className="flex-1 flex flex-col min-h-0 min-w-0"
             onKeyDown={hasMultiple ? handleImageKeyDown : undefined}
             tabIndex={hasMultiple ? 0 : undefined}
           >
+            <div aria-live="polite" aria-atomic="true" className="sr-only">
+              {liveMessage}
+            </div>
             <div className="flex-1 relative flex items-center justify-center p-4 min-h-0 min-w-0">
               {renderNavArrows()}
               {renderImageArea()}
@@ -851,9 +869,9 @@ export function ToolPage() {
             <div className="p-2 rounded-lg bg-primary text-primary-foreground">
               <IconComponent className="h-5 w-5" />
             </div>
-            <h2 className="font-semibold text-lg text-foreground">
+            <h1 className="font-semibold text-lg text-foreground">
               {getToolName(t, tool.id, tool.name)}
-            </h2>
+            </h1>
           </div>
 
           {renderSettingsContent()}
@@ -861,11 +879,14 @@ export function ToolPage() {
 
         {/* Main area: image viewer */}
         <section
-          aria-label="Image area"
+          aria-label={t.a11y.imageArea}
           className="flex-1 flex flex-col min-h-0 min-w-0"
           onKeyDown={hasMultiple ? handleImageKeyDown : undefined}
           tabIndex={hasMultiple ? 0 : undefined}
         >
+          <div aria-live="polite" aria-atomic="true" className="sr-only">
+            {liveMessage}
+          </div>
           <div className="flex-1 relative flex items-center justify-center p-6 min-h-0 min-w-0">
             {renderNavArrows()}
             {renderImageArea()}
diff --git a/apps/web/src/styles/globals.css b/apps/web/src/styles/globals.css
index 749d8c0a..fc7d1576 100644
--- a/apps/web/src/styles/globals.css
+++ b/apps/web/src/styles/globals.css
@@ -10,7 +10,7 @@
 }
 
 @theme {
-  --color-primary: #3b82f6;
+  --color-primary: #2563eb;
   --color-primary-foreground: #ffffff;
   --color-background: #ffffff;
   --color-foreground: #0f172a;
@@ -126,3 +126,18 @@ input[type="range"]::-moz-range-track {
   input[type="checkbox"] { width: 20px; height: 20px; }
   button, [role="button"], a { touch-action: manipulation; }
 }
+
+@media (prefers-reduced-motion: reduce) {
+  *,
+  *::before,
+  *::after {
+    animation-duration: 0.01ms !important;
+    animation-iteration-count: 1 !important;
+    transition-duration: 0.01ms !important;
+    scroll-behavior: auto !important;
+  }
+  .animate-spin {
+    animation-duration: 1.5s !important;
+    animation-iteration-count: infinite !important;
+  }
+}
diff --git a/tests/unit/use-focus-trap.test.ts b/tests/unit/use-focus-trap.test.ts
new file mode 100644
index 00000000..349d49d5
--- /dev/null
+++ b/tests/unit/use-focus-trap.test.ts
@@ -0,0 +1,8 @@
+import { describe, expect, it } from "vitest";
+
+describe("useFocusTrap", () => {
+  it("should be importable", async () => {
+    const mod = await import("../../apps/web/src/hooks/use-focus-trap");
+    expect(mod.useFocusTrap).toBeDefined();
+  });
+});