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/html-to-image.md

@@ -8,7 +8,7 @@ Capture a webpage URL or raw HTML content as a screenshot image. Supports device
 
 ## API Endpoint
 
-`POST /api/v1/tools/image/html-to-image`
+`POST /api/v1/tools/html-to-image`
 
 Accepts a **JSON body** (not multipart). No file upload is needed.
 
@@ -41,7 +41,7 @@ Either `url` or `html` must be provided, but not both.
 Capture a webpage:
 
 ```bash
-curl -X POST http://localhost:1349/api/v1/tools/image/html-to-image \
+curl -X POST http://localhost:1349/api/v1/tools/html-to-image \
   -H "Authorization: Bearer si_your-api-key" \
   -H "Content-Type: application/json" \
   -d '{"url": "https://example.com", "format": "png", "fullPage": true, "devicePreset": "desktop"}'
@@ -50,7 +50,7 @@ curl -X POST http://localhost:1349/api/v1/tools/image/html-to-image \
 Render HTML content:
 
 ```bash
-curl -X POST http://localhost:1349/api/v1/tools/image/html-to-image \
+curl -X POST http://localhost:1349/api/v1/tools/html-to-image \
   -H "Authorization: Bearer si_your-api-key" \
   -H "Content-Type: application/json" \
   -d '{"html": "<div style=\"padding: 20px; background: #f0f0f0;\"><h1>Hello</h1></div>", "format": "png"}'