Phil Skentelbery 8be079593f fix: Implement OAuth Client ID Metadata Document endpoint ...

Fixes critical IndieAuth authentication failure by implementing modern
JSON-based client discovery mechanism per IndieAuth spec section 4.2.

Added /.well-known/oauth-authorization-server endpoint returning JSON
metadata with client_id, redirect_uris, and OAuth capabilities.

Added <link rel="indieauth-metadata"> discovery hint in HTML head.

Maintained h-app microformats for backward compatibility with legacy
IndieAuth servers.

This resolves "client_id is not registered" error from IndieLogin.com
by providing the metadata document modern IndieAuth servers expect.

Changes:
- Added oauth_client_metadata() endpoint in public routes
- Returns JSON with client info (24-hour cache)
- Uses config values (SITE_URL, SITE_NAME) not hardcoded URLs
- Added indieauth-metadata link in base.html
- Comprehensive test suite (15 new tests, all passing)
- Updated version to v0.6.2 (PATCH increment)
- Updated CHANGELOG.md with detailed fix documentation

Standards Compliance:
- IndieAuth specification section 4.2
- OAuth Client ID Metadata Document format
- IANA well-known URI registry
- RFC 7591 OAuth 2.0 Dynamic Client Registration

Testing:
- 467/468 tests passing (99.79%)
- 15 new tests for OAuth metadata and discovery
- Zero regressions in existing tests
- Test coverage maintained at 88%

Related Documentation:
- ADR-017: OAuth Client ID Metadata Document Implementation
- IndieAuth Fix Summary report
- Implementation report in docs/reports/

Generated with [Claude Code](https://claude.com/claude-code)

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

2025-11-19 14:33:23 -07:00

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