docs: organize tool pages by modality under /tools/<modality>/

Move all 157 tool pages into image/video/audio/pdf/data subfolders so URLs read /tools/<modality>/<id> (e.g. /tools/image/crop). Nest the image sub-categories under an Image group in the sidebar so the nav reads by modality. Add public/_redirects (301, clean + .html forms) mapping every old flat /tools/<id> URL to its new path so inbound links keep working. Rewrite all internal /tools links. Verified with a clean docs build (no dead links).

apps/docs/tools/data/extract-zip.md

@@ -0,0 +1,43 @@
+---
+description: Safely extract files from a ZIP archive with bomb protection.
+---
+
+# Extract ZIP
+
+Safely extract files from a ZIP archive. Single-file archives return the contained file directly; multi-file archives return a flat ZIP with the extracted contents.
+
+## API Endpoint
+
+`POST /api/v1/tools/data/extract-zip`
+
+Accepts multipart form data with a ZIP file. No settings field is required.
+
+## Parameters
+
+This tool has no configurable parameters. Upload a `.zip` file to extract.
+
+## Example Request
+
+```bash
+curl -X POST http://localhost:1349/api/v1/tools/data/extract-zip \
+  -H "Authorization: Bearer si_your-api-key" \
+  -F "file=@archive.zip"
+```
+
+## Example Response
+
+```json
+{
+  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
+  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/archive.zip",
+  "originalSize": 2800000,
+  "processedSize": 3500000
+}
+```
+
+## Notes
+
+- Only `.zip` files are accepted as input.
+- If the archive contains a single file, that file is returned directly (not wrapped in a ZIP).
+- If the archive contains multiple files, a flat ZIP is returned with all files extracted to the root level (nested directory structure is flattened).
+- Built-in bomb protection rejects archives with excessive compression ratios or file counts to prevent resource exhaustion.