feat: SOTA sharpening tool with 3 methods and 7 presets (#56)

* feat(sharpening): add SharpenAdvancedOptions type for multi-method sharpening

* feat(sharpening): implement 3-method sharpen engine (adaptive, USM, high-pass)

* feat(sharpening): add dedicated API route with Zod validation

* feat(sharpening): register tool in constants, i18n, and suggested tools

* feat(sharpening): add settings UI with presets, methods, and advanced controls

* feat(sharpening): register tool in frontend registry with before-after display

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Co-authored-by: stirling-image <stirling-image@users.noreply.github.com>

apps/api/src/routes/tools/index.ts

@@ -30,6 +30,7 @@ import { registerRemoveBackground } from "./remove-background.js";
 import { registerReplaceColor } from "./replace-color.js";
 import { registerResize } from "./resize.js";
 import { registerRotate } from "./rotate.js";
+import { registerSharpening } from "./sharpening.js";
 import { registerSmartCrop } from "./smart-crop.js";
 import { registerSplit } from "./split.js";
 import { registerStitch } from "./stitch.js";
@@ -84,6 +85,7 @@ export async function registerToolRoutes(app: FastifyInstance): Promise<void> {
     { id: "strip-metadata", register: registerStripMetadata },
     { id: "edit-metadata", register: registerEditMetadata },
     { id: "color-adjustments", register: registerColorAdjustments },
+    { id: "sharpening", register: registerSharpening },
 
     // Watermark & Overlay
     { id: "watermark-text", register: registerWatermarkText },