docs: audit all 157 tool pages against live schemas

Reconcile every tool page's parameters, defaults, and response shape against the tool's Zod settings schema and executionHint in code. Notable fixes: color-palette (add count + format params, hex output, median-cut algorithm), favicon (add 5 params, was documented as having none), qr-generate (add logoDataUri), convert (add ppm/eps/tga formats), video-loudnorm (-16 LUFS not -14), smart-crop (async 202 not sync 200), images-to-video (1080x1080 square), and several output-filename and behavior-note corrections.

Also normalize API endpoint paths to /api/v1/tools/<id> (no modality segment) and standardize curl examples on the Docker API port 1349. Verified with a clean docs build.

apps/docs/tools/image/transparency-fixer.md

@@ -4,7 +4,7 @@ Fix fake transparent PNGs in one click. Uses AI matting (BiRefNet HR Matting mod
 
 ## API Endpoint
 
-`POST /api/v1/tools/image/transparency-fixer`
+`POST /api/v1/tools/transparency-fixer`
 
 **Processing:** Asynchronous (returns 202, poll `/api/v1/jobs/{jobId}/progress` for status via SSE)
 
@@ -22,7 +22,7 @@ Fix fake transparent PNGs in one click. Uses AI matting (BiRefNet HR Matting mod
 ## Example Request
 
 ```bash
-curl -X POST http://localhost:13490/api/v1/tools/image/transparency-fixer \
+curl -X POST http://localhost:1349/api/v1/tools/transparency-fixer \
   -F "file=@fake-transparent.png" \
   -F 'settings={"defringe":40,"outputFormat":"png"}'
 ```