Add project rename support in the sidebar

[juliusmarminge]

Closes #1370

Summary

• Adds inline project rename support from the sidebar project row context menu.
• Commits project title changes through project.meta.update and clears rename state on blur, Enter, or Escape.
• Updates orchestration store coverage so project.meta-updated refreshes the existing project name and timestamp.

Testing

• bun fmt
• bun lint
• bun typecheck
• bun run test

---

Note

Low Risk
Low risk UI/state changes that add a new project.meta.update command dispatch path; main risk is minor rename-state edge cases (blur/escape/enter) affecting sidebar interactions.

Overview
Adds inline project rename in the sidebar: a new "Rename project" context-menu action swaps the project title for an input, then commits on Enter/blur (or cancels on Escape) by dispatching project.meta.update.

Refactors thread renaming to pass explicit callbacks (onRenamingInputMount, hasRenameCommitted, markRenameCommitted) instead of exposing mutable refs, and ensures starting a rename clears any active rename state for the other entity (project vs thread).

Extends store tests to cover project.meta-updated updating an existing project’s name and updatedAt.

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Note

Add inline project rename support in the sidebar

• Adds a 'Rename project' option to the project context menu in Sidebar.tsx, replacing the static project name with an inline input when active.
• On Enter or blur, dispatches a project.meta.update command via the native API; on Escape, cancels without saving. Shows a toast on error.
• Starting a project rename cancels any active thread rename, and vice versa.
• Refactors thread rename props in SidebarThreadRow from ref-based to function-based (onRenamingInputMount, hasRenameCommitted, markRenameCommitted).
• Adds a test in store.test.ts verifying that project.meta-updated events correctly update project title and updatedAt in state.

^{Macroscope summarized fe56ef0.}

[macroscopeapp]

Approvability

Verdict: Needs human review

This PR adds a new user-facing feature (project rename in sidebar) with new API integration to dispatch 'project.meta.update' commands. While the implementation follows existing patterns for thread renaming and is well-contained, new features introducing user-facing behavior warrant human review to verify the intended UX and API contract.

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[MatthewFeroz]

Thank you for this, having an option to open file location would be nice as well. I will create a PR for this