refactor: remove lite variant, fix release workflow

- Remove all lite/full variant logic from frontend, API, shared constants,
  docs, and tests (single unified Docker image only)
- Replace single QEMU multi-arch Docker build with per-architecture native
  builds (amd64 + arm64) and manifest merge to fix disk space exhaustion
- Add disk cleanup step and per-platform build cache scopes
- Switch release trigger from push to workflow_dispatch
- Add GitHub issue templates and PR template

apps/web/src/pages/home-page.tsx

@@ -1,12 +1,10 @@
 import { CATEGORIES, TOOLS } from "@stirling-image/shared";
 import * as icons from "lucide-react";
-import { useCallback, useEffect, useMemo } from "react";
+import { useCallback, useEffect } from "react";
 import { useNavigate } from "react-router-dom";
-import { toast } from "sonner";
 import { ImageViewer } from "@/components/common/image-viewer";
 import { MultiImageViewer } from "@/components/common/multi-image-viewer";
 import { AppLayout } from "@/components/layout/app-layout";
-import { cn } from "@/lib/utils";
 import { useFileStore } from "@/stores/file-store";
 import { useSettingsStore } from "@/stores/settings-store";
 
@@ -17,14 +15,12 @@ export function HomePage() {
   const { setFiles, files, reset, originalBlobUrl, selectedFileName, selectedFileSize } =
     useFileStore();
   const navigate = useNavigate();
-  const { variantUnavailableTools, fetch: fetchSettings } = useSettingsStore();
+  const { fetch: fetchSettings } = useSettingsStore();
 
   useEffect(() => {
     fetchSettings();
   }, [fetchSettings]);
 
-  const unavailableSet = useMemo(() => new Set(variantUnavailableTools), [variantUnavailableTools]);
-
   const handleFiles = useCallback(
     (newFiles: File[]) => {
       reset();
@@ -33,25 +29,6 @@ export function HomePage() {
     [setFiles, reset],
   );
 
-  const handleToolClick = (route: string, toolId: string) => {
-    if (unavailableSet.has(toolId)) {
-      toast("This tool requires the full image.", {
-        description:
-          "Pull stirlingimage/stirling-image:latest for all features including AI tools.",
-        action: {
-          label: "Learn more",
-          onClick: () =>
-            window.open(
-              "https://stirling-image.github.io/stirling-image/guide/docker-tags",
-              "_blank",
-            ),
-        },
-      });
-      return;
-    }
-    navigate(route);
-  };
-
   const hasFile = files.length > 0;
 
   // If no file uploaded, show default layout (tool panel + dropzone)
@@ -103,11 +80,8 @@ export function HomePage() {
                   <button
                     key={id}
                     type="button"
-                    onClick={() => handleToolClick(tool.route, tool.id)}
-                    className={cn(
-                      "flex items-center gap-2 p-3 rounded-xl border border-border hover:border-primary hover:bg-primary/5 transition-colors text-left",
-                      unavailableSet.has(id) && "opacity-50",
-                    )}
+                    onClick={() => navigate(tool.route)}
+                    className="flex items-center gap-2 p-3 rounded-xl border border-border hover:border-primary hover:bg-primary/5 transition-colors text-left"
                   >
                     <div className="p-1.5 rounded-lg bg-primary/10 text-primary">
                       <Icon className="h-4 w-4" />
@@ -148,13 +122,8 @@ export function HomePage() {
                         <button
                           key={tool.id}
                           type="button"
-                          onClick={() => handleToolClick(tool.route, tool.id)}
-                          className={cn(
-                            "flex items-center gap-2.5 w-full py-1.5 px-2 rounded-lg text-left transition-colors",
-                            unavailableSet.has(tool.id)
-                              ? "opacity-50 hover:bg-muted/50"
-                              : "hover:bg-muted text-foreground",
-                          )}
+                          onClick={() => navigate(tool.route)}
+                          className="flex items-center gap-2.5 w-full py-1.5 px-2 rounded-lg text-left transition-colors hover:bg-muted text-foreground"
                         >
                           <Icon className="h-4 w-4 text-muted-foreground shrink-0" />
                           <span className="text-sm">{tool.name}</span>