feat(desktop): restore project jump links

[patroza]

Summary

• restore project jump links from archived commit e17c2bf90 onto the desktop deep-link overlay
• restore t3code://open/project parsing, environment/project resolution, Desktop navigation, the universal web jump route, and Sidebar/Sidebar V2 integration
• adapt the restored change to the current overlay by adding the newer DesktopLifecycle test mock method

Why this disappeared

PR #72 was merged into this overlay on July 26. GitHub history shows that PR #10 was force-pushed on July 27 at 05:26:37 UTC from 85a2a077 (where apps/web/src/projectJump.ts exists) to 6d9c07a3 (where it does not). Both replacement tips have the same parent and the same feat(desktop): open threads via t3code:// deep links subject. That means the overlay rewrite reconstructed the original deep-link commit from a stale/pre-#72 snapshot instead of replaying the complete current overlay tree, silently omitting the already-merged child PR. The archived integration ref retained e17c2bf90, which made this recovery possible.

Verification

• vp check
• ELECTRON_SKIP_BINARY_DOWNLOAD=1 vp run -r --cache --log labeled typecheck
• vp test run apps/desktop/src/app/DesktopLifecycle.test.ts apps/desktop/src/app/DesktopDeepLinks.test.ts apps/desktop/src/window/DesktopWindow.test.ts apps/desktop/src/window/DesktopApplicationMenu.test.ts apps/desktop/src/backend/DesktopBackendPool.test.ts apps/web/src/projectJump.test.ts (52 tests)
• vp run --cache build:desktop
• Fork CI preload bundle verification commands
• isolated vp run dev environment started successfully; collaborative preview navigation timed out and the preview client became unavailable, so browser click-through could not complete