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

---------

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

packages/shared/src/constants.ts

@@ -104,6 +104,14 @@ export const TOOLS: Tool[] = [
     icon: "SlidersHorizontal",
     route: "/adjust-colors",
   },
+  {
+    id: "sharpening",
+    name: "Sharpening",
+    description: "Adaptive, unsharp mask, and high-pass sharpening with presets",
+    category: "adjustments",
+    icon: "Focus",
+    route: "/sharpening",
+  },
   {
     id: "replace-color",
     name: "Replace & Invert Color",

packages/shared/src/i18n/en.ts

@@ -49,6 +49,10 @@ export const en = {
       description:
         "Brightness, contrast, exposure, saturation, temperature, sharpness, and effects",
     },
+    sharpening: {
+      name: "Sharpening",
+      description: "Adaptive, unsharp mask, and high-pass sharpening with presets",
+    },
     "replace-color": {
       name: "Replace & Invert Color",
       description: "Replace specific colors or invert",