chore: sync upstream main

[tarik02]

What Changed

• Merged five upstream commits through pingdotgg/t3code@196c8ea0d.
• Adopted the faster Windows update layout, with server.asar kept packed for the primary backend and extracted on demand for WSL.
• Included terminal PID polling and web copy fixes plus the updated desktop status indicator and sidebar tooltips.
• Preserved fork canary release notes and Win32 path behavior in the overlapping update and desktop test code.

Why

Brings the fork to current upstream after #133 without dropping fork-specific release-channel behavior.

UI Changes

This includes upstream update-indicator and tooltip changes. Screenshots were not captured because browser verification was not requested.

Verification

• lowio corepack pnpm install --frozen-lockfile
• lowio vp run --filter @t3tools/desktop --filter @t3tools/web --concurrency-limit 2 typecheck
• lowio vp test run apps/desktop/src/backend/DesktopBackendConfiguration.test.ts, 23 tests passed
• lowio vp lint --report-unused-disable-directives apps/desktop/src/backend/DesktopBackendConfiguration.test.ts apps/web/src/components/sidebar/SidebarUpdatePill.tsx

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 gpt-5.6-sol using the Codex harness in T3 Code.

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: a472540c74

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[chatgpt-codex-connector]

Dismiss fallback menus in Electron custom mode

When the desktop context-menu preference is custom, show() uses showContextMenuFallback() even though window.desktopBridge exists, but this guard makes close() a no-op. Consequently, clearing a terminal selection leaves its fallback menu and pending promise open until the user clicks elsewhere or presses Escape. Call dismissContextMenu() regardless of bridge presence; it already does nothing when no fallback menu is active.

AGENTS.md reference: AGENTS.md:L25-L31

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	−216 B (−2.0%)	15.1 KiB	✅
Codex	Thread snapshot wire	4.8 KiB	4.8 KiB	+5 B (+0.1%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	5.9 KiB	5.7 KiB	−221 B (−3.6%)	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	−259 B (−2.4%)	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	−260 B (−4.3%)	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: ba75303 · PR result: dff1279 · 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.