feat(web): rename focused sidebar thread with f2

[tarik02]

What Changed

Backports pingdotgg/t3code#6454.

Pressing F2 while focus is within a sidebar thread item opens its inline rename field and selects the full title. Enter saves the title and Escape cancels. This works in both sidebar implementations, and the shortcut remains configurable as thread.rename.

The sidebar also retains focus when navigating between threads instead of moving it to the composer.

Why

Thread rename was limited to pointer interactions. F2 makes it keyboard-accessible while keeping the shortcut scoped to the focused thread.

UI Changes

browser-recording-msrelwa3.mp4

Verification

• 196 focused tests passed
• Focused lint passed for all changed code
• Contracts, shared, and web typechecks passed
• The backport patch-id matches upstream PR #6454

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for the interaction change

Made with GPT-5.6 Sol via the Codex harness in T3 Code.

[chatgpt-codex-connector]

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Reviewed commit: 362bf0db6d

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[chatgpt-codex-connector]

Resolve rename against the active shortcut context

When focus is on an inactive row, this evaluates when clauses using that row's terminal state and defaults other standard context keys to false, while the global shortcut handlers consistently use the active routed thread and current UI state. For example, if the active thread has its terminal open and a user places an f2 binding such as terminal.toggle when terminalOpen after thread.rename, pressing F2 on an inactive row with no terminal incorrectly starts renaming and stops propagation instead of honoring the later binding. Use the same active shortcut context here and in the equivalent LegacySidebar handler.

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[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	10.5 KiB	10.5 KiB	−27 B (−0.3%)	15.1 KiB	✅
Codex	Thread snapshot wire	4.8 KiB	4.8 KiB	−6 B (−0.1%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	5.7 KiB	5.7 KiB	−21 B (−0.4%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	50.3 KiB	50.3 KiB	−44 B (−0.1%)	66.4 KiB	✅
Codex	Live turn messages	11	10	−1 (−9.1%)	21	✅
Claude	Total thread wire	10.5 KiB	10.5 KiB	+25 B (+0.2%)	15.1 KiB	✅
Claude	Thread snapshot wire	4.8 KiB	4.8 KiB	−3 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	5.7 KiB	5.7 KiB	+28 B (+0.5%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	51.1 KiB	51.1 KiB	+44 B (+0.1%)	66.4 KiB	✅
Claude	Live turn messages	9	10	+1 (+11.1%)	21	✅

Baseline: f9d2e2e · PR result: 0d6733e · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 76.2 KiB
• Claude decoded thread snapshot: 76.6 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.