feat(desktop): create notes & folders from the left nav (⌘N / ⇧⌘N, right-click)

[samkeen]

• b2-core: Vault::create_note — the model-free create sibling of add_note
  (shared file write + project_file, the same posture as Vault::write): the
  new note is projected immediately (tree / keyword search / graph) and its
  chunks join the DB-derived pending set for the next embed pass. add_note
  is unchanged; both share write_new_note.
• b2-desktop: thin create_note command (fake vault, outside the embed slot),
  AddTargetExists/AddDestination user-message mappings, command-layer tests.
• ui: New note / New folder icons in the tree head with ⌘N / ⇧⌘N shortcuts,
  contextual on the selection (the open document's folder, or the last folder
  clicked/right-clicked, tracked as state.selectedDir). The name is typed into
  an inline input row in the tree: Enter creates and opens the note in edit
  mode, blur creates quietly, Escape cancels; on a refusal the input stays up
  with the typed name. The tree's right-click menu is taken over wholesale
  (New note / New folder targeting the row under the cursor). Folders are
  staged UI state (pendingDirs) that materialize on disk with their first
  note — create_note makes parent dirs, so no empty dir the index-derived
  tree couldn't list is ever written. The tree pane render is memoized (the
  note-pane pattern) so an unrelated repaint can't eat the typed name.

Auto-index: a created note is projected at creation and embeds through the
existing autosave → trailing-embed pipeline once content is typed.

Co-Authored-By: Claude Fable 5 noreply@anthropic.com
Claude-Session: https://claude.ai/code/session_01RybX9LpMF7FvaJRgpcs3Cy

Summary by CodeRabbit

• New Features

  • Create empty notes without requiring an embedding model.
  • Added “New note” and “New folder” actions to the file tree and context menu.
  • New folders can be staged in the interface before being saved.
  • Added keyboard shortcuts and inline creation controls for notes and folders.
  • File-tree selection and navigation now persist more reliably during updates.

• Bug Fixes

  • Prevented accidental overwrites and invalid destination paths.
  • Improved error messages for existing notes and invalid names.
  • Context menus now remain within the visible window.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: d1204439-dcbb-4987-91b0-343fdb061b9e

📥 Commits

Reviewing files that changed from the base of the PR and between 92b8b31 and 2237f60.

📒 Files selected for processing (18)

• CLAUDE.md
• crates/b2-core/src/add.rs
• crates/b2-core/src/vault.rs
• crates/b2-core/tests/add.rs
• crates/b2-core/tests/explain.rs
• crates/b2-desktop/CLAUDE.md
• crates/b2-desktop/src/commands.rs
• crates/b2-desktop/src/error.rs
• crates/b2-desktop/src/main.rs
• ui/package.json
• ui/src/api.ts
• ui/src/main.ts
• ui/src/newentry.test.ts
• ui/src/newentry.ts
• ui/src/render.ts
• ui/src/state.ts
• ui/src/types.ts
• ui/style.css

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📝 Walkthrough

Walkthrough

Adds model-free note creation across the core vault, desktop IPC, and UI tree. Notes are projected without embedding, invalid destinations are reported, and the UI supports inline note or staged-folder creation.

Changes

Note creation flow

Layer / File(s)	Summary
Core note creation crates/b2-core/src/add.rs, crates/b2-core/src/vault.rs, crates/b2-core/tests/*	Separates file writing from ingestion and adds model-free create_note projection with validation and coverage.
Desktop command wiring crates/b2-desktop/src/commands.rs, crates/b2-desktop/src/error.rs, crates/b2-desktop/src/main.rs	Exposes note creation through Tauri, registers the command, maps errors, and tests creation behavior.
Tree creation contracts and rendering ui/src/state.ts, ui/src/types.ts, ui/src/newentry.ts, ui/src/render.ts, ui/src/api.ts, ui/style.css	Adds creation state, path utilities, staged-directory rendering, context-menu output, IPC types, API wiring, styling, and utility tests.
Tree creation interactions ui/src/main.ts, ui/package.json	Adds inline creation, folder staging, menu and keyboard actions, selection tracking, render preservation, and vault-switch resets.

Estimated code review effort: 4 (Complex) | ~60 minutes

Suggested reviewers: claude

Poem

I thumped a path, the note sprang bright,
No model needed, just write and light.
Folders wait in staged-up rows,
A little tree where creation grows.
Hop, hop—IPC carries the tune!

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/desktop-file-folder-creation-i2avbu

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