feat(gif-tools): SOTA upgrade with 6 processing modes (#52)

* feat(find-duplicates): upgrade to 128-bit dHash with metadata and thumbnails

* feat(find-duplicates): add custom-results display mode and duplicate store

* feat(find-duplicates): add results overview grid and detail comparison view

* feat(find-duplicates): overhaul settings with sensitivity presets and download actions

* feat(find-duplicates): update i18n description

* chore: replace jsqr with zxing-wasm for barcode reading

* feat(barcode-read): rewrite backend with zxing-wasm for all barcode types

* feat(barcode-read): rewrite frontend with multi-file, results table, progress, export

- Multi-file sequential processing with per-file progress
- Structured results table with type badges and copy per-result
- Copy All and Export CSV functionality
- Thorough scan toggle (maps to tryHarder in zxing-wasm)
- Before/after view shows annotated image with bounding boxes
- Updated tool description in constants and i18n

* feat(stitch): update tool name and description for redesign

* feat(stitch): add grid layout, alignment, border, radius, quality, and new resize modes

* feat(stitch): redesign settings UI with grid, alignment, border, radius, quality

* test(stitch): add stitch to e2e tool navigation suite

* feat(vectorize): redesign with dual-engine backend and preset-driven UI

- Backend: potrace for B&W, VTracer (@neplex/vectorizer) for full-color vectorization
- Frontend: 5 presets (logo, illustration, photo, sketch, custom)
- Settings: color precision, gradient step, detail, smoothing, corner threshold, invert
- Updated OpenAPI spec and i18n description

* feat(border): redesign with presets, shadow, padding color, swatches

- Add 8 one-click presets (Clean White, Gallery Black, Shadow, Rounded, Polaroid, Vintage, Minimal, Cinematic)
- Implement proper shadow rendering with blur, offset X/Y, color, opacity
- Add padding color control (was hardcoded white)
- Add color swatches for quick color selection
- Wrap in form for Enter key submission
- Add smart validation (requires at least one effect active)
- Align frontend/backend slider ranges
- Organize UI with sections and collapsible shadow toggle

* feat(split): overhaul image splitting with live grid overlay and tile preview

- Add interactive-split display mode with SplitCanvas component
- Live SVG grid overlay on uploaded image showing split boundaries
- Two split modes: Grid (NxM) and Tile Size (px dimensions)
- 9 grid presets (2x1, 1x2, 2x2, 3x1, 1x3, 3x3, 2x3, 3x2, 4x4)
- Output format selection (original/PNG/JPG/WebP) with quality slider
- Post-split tile preview thumbnails with individual download
- Download All as ZIP button
- HEIC/HEIF preview with loading spinner
- Backend: tile-size mode, output format conversion, quality control
- Zustand store for split state management

* feat(split): rewrite backend and frontend settings

Backend: tile-size mode, output format conversion, quality control.
Frontend: split modes, presets, format selector, tile preview grid.

* feat(border): add live CSS preview and remove before/after slider

- Add imageWrapperStyle prop to ImageViewer for live border preview
- Add onImageStyle callback through tool-page to settings components
- Change border displayMode to no-comparison (no slider)
- BorderControls sends live CSS styles (border, padding, radius, shadow)
- Preview updates instantly as user adjusts sliders or clicks presets

* fix: repair i18n file corrupted by formatter during merge conflict resolution

* feat(border): enable live CSS preview in right pane as settings change

* fix(border): keep CSS preview visible after processing for WYSIWYG consistency

* chore(gif-tools): scaffold for SOTA upgrade

- Add animated GIF test fixture (3 frames, 100x100)
- Update tool description to reflect new capabilities
- Add fflate dependency to API for ZIP creation

* feat(gif-tools): rewrite backend with 6 processing modes

Modes: resize (with percentage), optimize (colors/dither/effort),
speed (delay manipulation), reverse (frame reorder), extract
(single/range/all with ZIP), rotate (90/180/270 + flip).

Adds /api/v1/tools/gif-tools/info metadata endpoint.

* test(gif-tools): add integration tests for all 6 modes

Tests metadata endpoint, resize (pixel + percentage), optimize,
speed, reverse, extract (single/range/all), and rotate (angle + flip).

Fix animated.gif fixture to be a real 3-frame animation (was a single
100x300 frame). Fix reverse and rotate modes to process frames
individually and reassemble via GIF binary concatenation, since
Sharp 0.33.x loses page-height metadata when reconstructing from raw
pixel data.

* feat(gif-tools): rewrite frontend with tabbed 6-mode UI

- useGifInfo hook for metadata (frame count, dimensions, duration)
- Info bar showing GIF properties
- 3x2 mode grid: Resize, Optimize, Speed, Reverse, Extract, Rotate
- Animation modes disabled for static images
- Loop control (infinite/once/custom)
- Batch processing support

* test(gif-tools): add to representative tools in e2e suite

---------

Co-authored-by: Siddharth Kumar Sah <siddharth123sk@gmail.com>

apps/web/src/lib/tool-registry.tsx

@@ -20,7 +20,9 @@ export type DisplayMode =
   | "no-comparison"
   | "interactive-crop"
   | "interactive-eraser"
-  | "no-dropzone";
+  | "interactive-split"
+  | "no-dropzone"
+  | "custom-results";
 
 // ── Crop and eraser prop types ─────────────────────────────────────
 
@@ -55,6 +57,7 @@ export interface ToolRegistryEntry {
     onPreviewTransform?: (t: PreviewTransform) => void;
     onPreviewFilter?: (filter: string) => void;
     onBgPreview?: (state: BgPreviewState | null) => void;
+    onImageStyle?: (style: React.CSSProperties | null) => void;
     cropProps?: CropProps;
     eraserProps?: EraserProps;
   }>;
@@ -122,6 +125,11 @@ const FindDuplicatesSettings = lazy(() =>
     default: m.FindDuplicatesSettings,
   })),
 );
+const FindDuplicatesResults = lazy(() =>
+  import("@/components/tools/find-duplicates-results").then((m) => ({
+    default: m.FindDuplicatesResults,
+  })),
+);
 const ColorPaletteSettings = lazy(() =>
   import("@/components/tools/color-palette-settings").then((m) => ({
     default: m.ColorPaletteSettings,
@@ -151,6 +159,9 @@ const StitchSettings = lazy(() =>
 const SplitSettings = lazy(() =>
   import("@/components/tools/split-settings").then((m) => ({ default: m.SplitSettings })),
 );
+const SplitCanvas = lazy(() =>
+  import("@/components/tools/split-canvas").then((m) => ({ default: m.SplitCanvas })),
+);
 const BorderSettings = lazy(() =>
   import("@/components/tools/border-settings").then((m) => ({ default: m.BorderSettings })),
 );
@@ -286,7 +297,14 @@ export const toolRegistry = new Map<string, ToolRegistryEntry>([
   // Utilities
   ["info", { displayMode: "before-after", Settings: InfoSettings }],
   ["compare", { displayMode: "before-after", Settings: CompareSettings }],
-  ["find-duplicates", { displayMode: "before-after", Settings: FindDuplicatesSettings }],
+  [
+    "find-duplicates",
+    {
+      displayMode: "custom-results",
+      Settings: FindDuplicatesSettings,
+      ResultsPanel: FindDuplicatesResults,
+    },
+  ],
   ["color-palette", { displayMode: "before-after", Settings: ColorPaletteSettings }],
   [
     "qr-generate",
@@ -297,8 +315,11 @@ export const toolRegistry = new Map<string, ToolRegistryEntry>([
   // Layout & Composition
   ["collage", { displayMode: "before-after", Settings: CollageSettings }],
   ["stitch", { displayMode: "no-comparison", Settings: StitchSettings }],
-  ["split", { displayMode: "before-after", Settings: SplitSettings }],
-  ["border", { displayMode: "before-after", Settings: BorderSettings }],
+  [
+    "split",
+    { displayMode: "interactive-split", Settings: SplitSettings, ResultsPanel: SplitCanvas },
+  ],
+  ["border", { displayMode: "live-preview", livePreview: true, Settings: BorderSettings as never }],
 
   // Format & Conversion
   ["svg-to-raster", { displayMode: "before-after", Settings: SvgToRasterSettings }],