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>

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

@@ -249,6 +249,11 @@ const ColorizeSettings = lazy(() =>
     default: m.ColorizeSettings,
   })),
 );
+const NoiseRemovalSettings = lazy(() =>
+  import("@/components/tools/noise-removal-settings").then((m) => ({
+    default: m.NoiseRemovalSettings,
+  })),
+);
 
 // ── Color tool wrapper ─────────────────────────────────────────────
 // Color tools share a single component but differ by toolId.
@@ -378,6 +383,7 @@ export const toolRegistry = new Map<string, ToolRegistryEntry>([
     },
   ],
   ["colorize", { displayMode: "before-after", Settings: ColorizeSettings }],
+  ["noise-removal", { displayMode: "before-after", Settings: NoiseRemovalSettings }],
 ]);
 
 export function getToolRegistryEntry(toolId: string): ToolRegistryEntry | undefined {