feat(v3.12.0): media pipeline, AI image generation, capability probe, companion v2.9.0

Three-month batch sync from internal repo (~80 commits) covering Tracks F.5a, F.7e, F.8, F.17, F.18, F.X.

WordPress media pipeline
- Pillow-based optimization, AI image generation (OpenAI / Stability / Replicate / Google Nano Banana / OpenRouter), chunked + resumable uploads, bulk delete/reassign, idempotent retries.

Capability discovery (F.7e)
- Per-site credential probe + adapters for WordPress / WooCommerce / Gitea, tier-fit unions granted ∪ roles, capability badge UI with HTMX partial re-check, install hint in every companion-unreachable error.

Companion plugin overhaul
- Renamed wordpress-plugin/airano-mcp-seo-bridge → wordpress-plugin/airano-mcp-bridge.
- Eight new endpoints: /capabilities, /bulk-meta, /export, /cache-purge, /transient-flush, /site-health, /audit-hook, /upload-and-attach.
- wp.org Plugin Check pass: i18n, WP_Filesystem, scheme allowlist on audit-hook URL.

Other
- Gitea ergonomics (F.17): batch files, tree, search, compare, releases, fork.
- Opportunistic bcrypt upgrade for legacy SHA-256 admin keys (F.8).
- n8n refactor: structured errors, capability probe, missing tools backfilled.
- Idempotency-Key dedup for AI media upload retries; WP client fast-fails on unreachable sites.

Docs
- README + CLAUDE.md drop the fixed "633 tools" claim. The total grows with each release; per-plugin approximations + dashboard-surfaced counts replace it.
- Tools/Tests badges removed in favour of "Plugins: 10".

Deployment
- PyPI mirror chain, optional BUILD_HTTP_PROXY, Alpine→Yandex apk mirror, Debian-slim Plan-B Dockerfile, mirror.gcr.io variant.

CI
- Black + Ruff clean on Python 3.12; pytest tests/ green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -4,7 +4,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 ## Project Overview
 
-**MCP Hub** — a Python MCP (Model Context Protocol) server that manages multiple self-hosted services through a unified plugin architecture. Supports 10 plugin types (WordPress, WooCommerce, WordPress Advanced, Gitea, n8n, Supabase, OpenPanel, Appwrite, Directus, Coolify) with 633 tools total. The tool count stays constant regardless of how many sites are configured.
+**MCP Hub** — a Python MCP (Model Context Protocol) server that manages multiple self-hosted services through a unified plugin architecture. Supports 10 plugin types (WordPress, WooCommerce, WordPress Advanced, Gitea, n8n, Supabase, OpenPanel, Appwrite, Directus, Coolify). Total tool count varies with which plugins are enabled and grows as new plugins are added; per-plugin counts are surfaced in the dashboard. The exposed count for a given user/endpoint stays constant regardless of how many sites of the same type are configured.
 
 ## Quick Setup
 
@@ -190,7 +190,7 @@ v4 development cycle with 15 phases. See `docs/ROADMAP.md` (Track F) and `.claud
 ## Gotchas
 
 - Test files exist in both `tests/` (proper) and root directory (legacy `test_*.py`). Run `pytest tests/` for organized tests only.
-- `wordpress-plugin/` contains companion WP plugins (openpanel, airano-mcp-seo-bridge) — these are PHP, not Python
+- `wordpress-plugin/` contains companion WP plugins (openpanel, airano-mcp-bridge) — these are PHP, not Python
 - `env.example` has "FUTURE" labels for Supabase/Gitea but both are fully implemented
 - 5 plugins are tested for public use: WordPress, WooCommerce, Supabase, OpenPanel, Gitea. Others are admin-only or disabled.
 - OAuth Clients (Client ID/Secret) are for MCP endpoint auth, NOT the same as GitHub/Google dashboard login