feat(noise-removal): SOTA noise removal with 4 quality tiers (#57)

* feat(noise-removal): register tool in shared constants and i18n

* feat(noise-removal): add SCUNet and NAFNet model architectures

* feat(noise-removal): add Python denoising engine with 4 quality tiers

* feat(noise-removal): add TypeScript bridge for Python sidecar

* feat(noise-removal): add frontend settings with 4-tier selector

* feat(noise-removal): register in tool registry and pipeline

* feat(noise-removal): add Fastify API route with Zod validation

* feat(noise-removal): add SCUNet and NAFNet model downloads to Docker build

* test(noise-removal): add to e2e tool page rendering tests

* test(noise-removal): add integration tests for API endpoint

* style: fix biome formatting and import ordering

* fix(noise-removal): use correct model download URLs

NAFNet model is hosted on HuggingFace, not GitHub releases.
Also align SCUNet URL to use the KAIR releases (same as Docker build).

* fix(noise-removal): remove emojis from tier selector, simplify labels

Drop emoji icons from Quick/Balanced/Quality/Maximum buttons. Replace
technical algorithm names with plain descriptions users can understand.

---------

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

packages/shared/src/constants.ts

@@ -185,6 +185,14 @@ export const TOOLS: Tool[] = [
     icon: "Palette",
     route: "/colorize",
   },
+  {
+    id: "noise-removal",
+    name: "Noise Removal",
+    description: "AI-powered noise and grain removal",
+    category: "ai",
+    icon: "Sparkles",
+    route: "/noise-removal",
+  },
   // Watermark & Overlay
   {
     id: "watermark-text",
@@ -405,4 +413,5 @@ export const PYTHON_SIDECAR_TOOLS = [
   "erase-object",
   "ocr",
   "colorize",
+  "noise-removal",
 ] as const;

packages/shared/src/i18n/en.ts

@@ -80,6 +80,10 @@ export const en = {
       description:
         "One-click auto-improve with smart exposure, contrast, color, and sharpness correction",
     },
+    "noise-removal": {
+      name: "Noise Removal",
+      description: "AI-powered noise and grain removal",
+    },
     "content-aware-resize": {
       name: "Content-Aware Resize",
       description: "Intelligently resize images while preserving important content",