Adopt 2026-09-22 upstream batches: server contracts resilience, device maintenance, mobile polish, and Opus 5.5

[rynfar]

Tracking adoption of upstream commits up to f25a8e4b72:

• 80d9c181da (#12763) fix(contracts): old message-sent events without turnId no longer stop the server from starting
• 790be6d755 (#12819) fix(devices): safely reclaim obsolete managed tool versions
• 1de563c149 (#12877) feat(devices): offer manual updates in tool version details
• f25a8e4b72 (#13094) feat(models): add opus 5.5 without changing existing aliases
• 1eeeabb26f (#12855) fix(mobile): use a proper pull request icon on iOS
• 33cb911ceb (#12949) fix(mobile): stop iOS autocorrect from rewriting search queries
• aff9318bf4 (#10338) fix(web): retry failed attachment uploads after reconnect