sync: v3.2.0 pre-release audit — namespace fix, config types, docs update

- fix(seo): REST API namespace seo-api-bridge/v1 → airano-mcp-seo-bridge/v1
- fix(config): add transport type field (streamableHttp/http) to config snippets
- feat(dashboard): support section for OAuth users, connect page guidance
- docs: hosted option, test count 481, WP plugin link, OAuth env vars, per-user endpoints

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CONTRIBUTING.md

@@ -120,7 +120,7 @@ Then register in `plugins/__init__.py` and add tests.
 core/       # Core system (auth, site manager, tool registry, dashboard)
 plugins/    # Plugin system (9 plugins, each with handlers + schemas)
 core/templates/  # Jinja2 templates (dashboard + OAuth)
-tests/           # Test suite (290 tests)
+tests/           # Test suite (481 tests)
 scripts/    # Setup & deployment scripts
 docs/       # Documentation
 ```