docs: multi-modality rebrand, 2.0 architecture accuracy, and full OpenAPI coverage (#254)

* docs: rebrand from image-only to multi-modality across docs and metadata

SnapOtter expanded from image-only to 157 tools across 5 modalities
(image, video, audio, document/PDF, data). Update all product-level
copy, metadata, and i18n that still framed it as an image-only tool.

- README, package.json, root llms.txt: multi-modality framing, 157 tools
- OpenAPI info + tags, generated /llms.txt tagline (docs.ts)
- VitePress docs site: hero, getting-started, architecture, security,
  deployment, configuration, developer, supported-formats
- i18n: 10 product keys across all 21 locales (hero, app description,
  privacy notes, AI features, progress messages, getting-started)
- web/demo/landing meta + privacy copy, COMMUNITY_GUIDE, .env.example

Stale tool counts (53/50+/52/70+/35) corrected to 157 throughout.
Database/container deployment claims left unchanged (out of scope).

* docs: fix stale post-rebrand test assertions and README language list

- tests/e2e-docs/homepage.spec.ts: assert the current docs homepage (file toolkit, 157 tools, 5 modalities) instead of the old image-only strings
- tests/unit/api/docs-route.test.ts: sync the reproduced llms.txt tagline with docs.ts
- README.md: 21 languages with the correct list (add Swedish and Chinese Traditional, drop Czech which is not supported)

* docs: correct 2.0 architecture references (Postgres 17 + Redis 8, 3-container stack)

The docs and metadata still described the 1.x stack (SQLite, single container, p-queue). Update them to the current 2.0 reality.

- README: replace the broken single-container `docker run` quick-start with the real Docker Compose stack (app + Postgres 17 + Redis 8); fix the "no Redis, no Postgres" feature bullet
- package.json: description no longer claims a single container
- apps/docs: rewrite database.md for Postgres; configuration.md DB_PATH -> DATABASE_URL + REDIS_URL; architecture.md SQLite/p-queue/better-sqlite3 -> Postgres/BullMQ/pg and add media-engine + doc-engine; developer/security/deployment/docker-tags/getting-started/contributing compose examples now include postgres + redis; index.md + api/ai.md AI count 16 -> 19
- SECURITY.md: Drizzle (SQLite) -> (PostgreSQL)
- landing: enterprise/FeatureHighlights single-container wording; TrustSignals/ToolGrid 150+ -> 157 (dynamic); Pricing/FAQ 15 -> 19 AI tools

* docs(api): document all video, audio, document, and data tool endpoints in OpenAPI

The spec covered only image tools; the Scalar UI and the generated /llms.txt and /llms-full.txt inherited that gap. Add the 104 missing tool endpoints so the API docs match the code.

- Video: 29 endpoints (most long/async; auto-subtitles is AI)
- Audio: 17 (transcribe-audio is AI)
- Document/PDF: 36 (ocr-pdf is AI; conversions are long/async)
- Data: 10
- Image: 12 newer tools (background-replace, blur-background AI; histogram/lqip-placeholder/sprite-sheet custom responses; barcode-generate uses a JSON body)

Each schema is derived from the tool's Zod validator and executionHint (fast -> 200, long -> 202+SSE, AI adds 501 FeatureNotInstalledError, multi-file inputs as arrays), referencing the existing shared schemas. Tool path entries: 64 -> 168. Spec parses as valid YAML with no duplicate paths and only known $refs.

apps/docs/.vitepress/config.mts

@@ -5,7 +5,7 @@ import pkg from "../../../package.json";
 export default defineConfig({
   title: "SnapOtter",
   description:
-    "Documentation for SnapOtter - A Self Hosted Image Manipulator. 53 tools, local AI, pipelines, REST API.",
+    "Documentation for SnapOtter - A Self-Hosted File Manipulation Suite. 157 tools for image, video, audio, PDF, and data processing. Local AI, pipelines, REST API.",
   base: "/",
   appearance: { initialValue: "light" },
   srcDir: ".",
@@ -25,7 +25,7 @@ export default defineConfig({
     ["meta", { property: "og:image", content: "https://docs.snapotter.com/og-image.png" }],
     ["meta", { property: "og:image:width", content: "1280" }],
     ["meta", { property: "og:image:height", content: "640" }],
-    ["meta", { property: "og:image:alt", content: "SnapOtter - Self-Hosted Image Processing" }],
+    ["meta", { property: "og:image:alt", content: "SnapOtter - Self-Hosted File Processing" }],
     ["meta", { property: "og:locale", content: "en_US" }],
     ["meta", { name: "twitter:card", content: "summary_large_image" }],
     ["meta", { name: "twitter:site", content: "@SnapOtterHQ" }],
@@ -76,9 +76,9 @@ export default defineConfig({
 `,
         customTemplateVariables: {
           description:
-            "SnapOtter is a self-hosted, open-source image processing platform with 53 tools including AI/ML. Runs in a single Docker container with GPU auto-detection.",
+            "SnapOtter is a self-hosted, open-source file processing platform with 157 tools across image, video, audio, PDF, and data. Includes AI/ML tools. Runs via Docker Compose with GPU auto-detection.",
           details:
-            "Resize, compress, convert, remove backgrounds, upscale, run OCR, and more - without sending images to external services.",
+            "Process images (resize, compress, convert, remove backgrounds, upscale, OCR), videos (trim, merge, subtitles), audio (normalize, transcribe, convert), PDFs (merge, split, watermark, redact), and data files (CSV, JSON, XML conversion) - without sending files to external services.",
         },
       }),
     ],