fix(app): restore project rename entry and harden sidebar against nested interactives

[Astro-Han]

Summary

Restore the PawWork sidebar project rename/remove entry points and harden the sidebar against nested interactive controls.

This PR:

• Adds missing project action i18n keys for rename, remove/hide, undo, and failure toasts.
• Splits the project group collapse button and overflow menu button into sibling controls via a local ProjectGroupHeader component.
• Adds a sidebar invariant test that fails when interactive JSX controls are nested inside other interactive controls.
• Extends the project sidebar E2E coverage for overflow menu, right-click context menu, translated rename dialog copy, and rename persistence.

Why

Task #18 reported that the installed app could not rename a left-sidebar workspace/project and that the rename dialog looked wrong.

RCA found two regressions from PR #517 / commit def93393c:

• The project group header nested DropdownMenu.Trigger as={IconButton} inside the collapse <button>, creating invalid button-inside-button DOM. Desktop WebView event/focus handling made the project menu entry unreliable.
• Project rename/remove keys were referenced in code but missing from en.ts and zh.ts, so the dialog/menu copy could show raw keys if the entry point opened.

Related Issue

Task #18.

Human Review Status

Pending. A human should make the final merge decision after reviewing the final diff and verification evidence.

Review Focus

• ProjectGroupHeader structure: the group toggle and project menu trigger must remain siblings, not nested controls.
• Sidebar invariant test coverage: it should catch future nested interactive controls without introducing a new lint mechanism.
• E2E coverage for project overflow menu, right-click context menu, translated dialog title, and renamed header persistence.
• i18n wording for remove/hide semantics: project removal hides the project from the sidebar and can be undone.

Risk Notes

Low-to-medium UI risk. The behavior change is scoped to project group headers in the PawWork sidebar. Session row and workspace row behavior are intentionally untouched. The remove action remains hide-from-sidebar, not file deletion.

No dependency, permission, packaging, migration, or generated-file changes.

How To Verify

Typecheck: passed (`bun --cwd packages/app typecheck`)
Unit/invariant: 1045 passed, 0 failed (`bun --cwd packages/app test:unit -- src/pages/layout/sidebar-interactive-invariant.test.ts`)
Project sidebar E2E: 3 passed (`bun --cwd packages/app test:e2e:local -- e2e/sidebar/sidebar-project-actions.spec.ts --project=chromium`)
Diff check: no whitespace errors (`git diff origin/dev --check`)

Screenshots or Recordings

Installed-app reproduction screenshots were uploaded in Slock thread #PawWork:2c7f3674:

• Project group menu trigger visible: c8e7a5e8-0deb-467e-95f8-24e044d01a60
• Clicking/right-clicking project group did not open the menu: 79bff17a-2f7e-4f02-8400-85c5142e64b9
• Session rename dialog reference: 121cb679-c80a-4f3a-845b-a29cc16e71da

The focused E2E also captures the project header, opened menu, rename dialog, and post-rename state as Playwright artifacts.

Checklist

• Human review status is stated above as pending, approved, or not required
• I linked the related issue, or stated why there is no issue
• This PR has type, primary area, and priority labels, or I requested maintainer labeling
• I described the review focus and any meaningful risks
• I listed the relevant verification steps and the key result for each
• I did not introduce unrelated refactors, dependencies, generated files, or file changes beyond the stated scope
• I manually checked visible UI or copy changes when needed, with screenshots or recordings
• I considered macOS and Windows impact for platform, packaging, updater, signing, paths, shell, or permissions changes
• I called out docs, release notes, dependencies, permissions, credentials, deletion behavior, generated content, or local file changes when relevant
• I reviewed the final diff for unrelated changes and suspicious dependency changes
• I am targeting dev, and my PR title and commit messages use Conventional Commits in English

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: fd7fdd7d-b24b-4b77-b11b-02f648e6b399

📥 Commits

Reviewing files that changed from the base of the PR and between 577233b and 1d1cc1b.

📒 Files selected for processing (6)

• packages/app/e2e/selectors.ts
• packages/app/e2e/sidebar/sidebar-project-actions.spec.ts
• packages/app/src/i18n/en.ts
• packages/app/src/i18n/zh.ts
• packages/app/src/pages/layout/pawwork-sidebar.tsx
• packages/app/src/pages/layout/sidebar-interactive-invariant.test.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/project-rename-entry

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[gemini-code-assist]

Code Review

This pull request introduces context menu support for project headers in the sidebar, allowing users to rename or remove projects via right-click. It refactors the sidebar implementation by extracting the ProjectGroupHeader component and updates the corresponding E2E tests and internationalization files for English and Chinese. Additionally, a new test suite was added to enforce an invariant against nesting interactive controls within the sidebar. I have no feedback to provide.