chore: sync upstream main

[tarik02]

What Changed

• Merged 22 upstream-only commits through pingdotgg/t3code@df19f6cfe.
• Added the latest pull request filters, reactions, in-place editing, branch updates, cross-environment listing, and diff improvements.
• Brought in Connect environment deregistration, relay source-control fixes, Codex collaboration prompt updates, and recent web and mobile fixes.
• Preserved fork goal controls, request_user_input support, Nix desktop packaging, and fork release behavior.

Why

Actualizes the fork to current upstream while keeping intentional fork behavior in overlapping server and right-panel code.

UI Changes

This includes upstream UI changes. Screenshots were not captured because browser verification was not requested.

Verification

• vp test run apps/server/src/provider/Layers/CodexSessionRuntime.test.ts apps/web/src/components/pullRequest/pullRequestDetail.logic.test.ts apps/web/src/rightPanelStore.test.ts
• vp lint --report-unused-disable-directives apps/server/src/provider/CodexDeveloperInstructions.ts apps/web/src/components/ChatView.tsx apps/web/src/components/RightPanelTabs.tsx
• vp run --filter t3 --filter @t3tools/web --concurrency-limit 2 typecheck

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 animation/interaction changes

Made with Codex using GPT-5.6 in T3 Code.

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 31ec69374f

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[chatgpt-codex-connector]

Preserve the first keystroke in an empty composer

When the empty right-panel launcher is visible and the user focuses an empty chat composer, pressing any launcher letter (b, t, f, d, p, a, or g) passes this condition, so the capture-phase handler prevents the keystroke and opens a panel surface instead of entering the first character of the prompt. Treat any focused contenteditable as a typing context regardless of its current text content.

Useful? React with 👍 / 👎.

[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	10.7 KiB	10.5 KiB	−228 B (−2.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	4.8 KiB	4.8 KiB	+7 B (+0.1%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	5.9 KiB	5.7 KiB	−235 B (−3.9%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	51.7 KiB	50.2 KiB	−1.5 KiB (−2.9%)	66.4 KiB	✅
Codex	Live turn messages	11	9	−2 (−18.2%)	21	✅
Claude	Total thread wire	10.7 KiB	10.5 KiB	−225 B (−2.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	4.8 KiB	4.8 KiB	−1 B (−0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	5.9 KiB	5.7 KiB	−224 B (−3.7%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	52.6 KiB	51.1 KiB	−1.5 KiB (−2.9%)	66.4 KiB	✅
Claude	Live turn messages	11	9	−2 (−18.2%)	21	✅

Baseline: 334aa45 · PR result: 31ec693 · 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.