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/video/video-metadata.md

@@ -8,7 +8,7 @@ Strip metadata (creation date, GPS coordinates, camera model, software tags, etc
 
 ## API Endpoint
 
-`POST /api/v1/tools/video/video-metadata`
+`POST /api/v1/tools/video-metadata`
 
 Accepts multipart form data with a video file. This tool has no configurable settings.
 
@@ -19,7 +19,7 @@ This tool has no parameters. It strips all metadata from the video container.
 ## Example Request
 
 ```bash
-curl -X POST http://localhost:1349/api/v1/tools/video/video-metadata \
+curl -X POST http://localhost:1349/api/v1/tools/video-metadata \
   -H "Authorization: Bearer si_your-api-key" \
   -F "file=@clip.mp4"
 ```
@@ -29,9 +29,18 @@ curl -X POST http://localhost:1349/api/v1/tools/video/video-metadata \
 ```json
 {
   "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
-  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/clip.mp4",
+  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/clip_clean.mp4",
   "originalSize": 12500000,
-  "processedSize": 12480000
+  "processedSize": 12480000,
+  "metadata": {
+    "container": "mov,mp4,m4a,3gp,3g2,mj2",
+    "durationS": 42.5,
+    "bitrateKbps": 2350,
+    "streams": [
+      { "type": "video", "codec": "h264", "width": 1920, "height": 1080 },
+      { "type": "audio", "codec": "aac", "sampleRate": 48000 }
+    ]
+  }
 }
 ```