fix(desktop): refresh history titles after topic changes / 主题变更后同步刷新历史标题

[xxoingr]

Summary

• Refresh the open HistoryPanel session snapshot whenever project-tree:changed reports a topic title update.
• Keep session-list reloads disabled while HistoryPanel is closed to avoid unnecessary disk scans.
• Recheck the current history view before applying an asynchronous refresh so a closed or replaced panel cannot receive stale results.
• Add focused regression coverage for the project-tree event wiring and callback initialization order while keeping App.tsx within its repository size ratchet.

Issues

Fixes #8280

Verification

• cd desktop/frontend && pnpm exec tsx src/__tests__/history-refresh-contract.test.ts
• cd desktop/frontend && node_modules/.bin/tsc.cmd --noEmit
• cd desktop/frontend && node_modules/.bin/eslint.cmd "src/**/*.{ts,tsx}"
• cd desktop/frontend && node scripts/test-todo-visibility.mjs
• Frontend discovery suites covered in a segmented Windows run; the existing timing-sensitive failure passed 91/91 when rerun in isolation, and all remaining suites passed.
• go vet ./...
• go run github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.12.2 run --timeout=5m ./...
• go run ./tools/repolint
• git diff --check upstream/main-v2...HEAD

Documentation impact

Documentation-impact: none - This change restores the existing desktop history-title synchronization behavior without changing features, configuration, or documented user workflows.

Cache impact

Cache-impact: none - The change is limited to desktop frontend state refresh wiring and regression coverage; it does not alter prompts, tool definitions, request serialization, or provider-visible prefixes.
Cache-guard: N/A - Focused regression coverage, type checking, frontend linting, golangci-lint, and repolint cover the changed desktop-only path.
System-prompt-review: N/A