Release v4.6.4-beta.1

What's Changed

• fix(channels): restore exact URL checkbox state (b8f6ffc7)
• fix(release): generate notes from git history (fc73c424)
• fix(update): unify release checks and avoid GitHub API (4327f142)
• docs(update): sync release check documentation (83d81a55)
• chore: rename release skill to ccload-release (a932d3c9)
• feat(release): auto-commit and push release revisions (8cd2d88a)
• fix(release): keep Beta versions on stable minor (addde3d0)
• perf(ci): parallelize release verification and builds (1274f8c7)
• fix(storage): batch debug log cleanup (23bcc2bf)
• feat(codex): add OAuth channel support (1c96c433)
• feat(codex): show OAuth plan metadata (ee5e87af)
• feat(codex): refresh and inspect OAuth credentials (b0f74570)
• fix(channels): show only Codex plan in list (7a4e9dea)
• feat(codex): import credentials in batches (89fb37e1)
• feat(codex): show channel quota usage (e9768b0b)
• feat(channels): refine Codex management filters (6be68930)
• fix: align channel editor and remove 88code remnants (fd4b00b1)
• fix(storage): make Codex credential schema MySQL-compatible (65358d8c)
• fix(storage): restore nullable Codex credentials (f35bdfde)
• feat(channels): add Antigravity OAuth support (2d07946b)
• fix(storage): repair legacy PostgreSQL migration fixture (1288afab)
• fix(proxy): return context overflow as client error (5f8e3eb6)
• feat(oauth): auto-detect imported credentials (e3a31007)
• fix(protocol): normalize Gemini thinking levels (f6130b75)
• feat(oauth): add Antigravity quota refresh (fb49b7c7)
• fix(oauth): assign import priorities by filename (9ca9a04a)
• feat(oauth): improve Antigravity credential handling (d0b9ed35)
• fix(protocol): normalize Codex chat responses (3cc0c9d2)

Full Changelog: v4.6.0...v4.6.4-beta.1