Notes management

The desktop sidebar has two modes: Files (the filesystem tree from #77) and Notes (a curated registry of markdown notes you've created through the app). The mode toggle sits at the top of the sidebar.

Notes registry

When the user creates a note from the app, an entry is recorded in <workspaceFolder>/.mid/notes.json:

The registry lives inside the workspace so it travels with the project on disk, syncs along with the markdown files, and stays decoupled from the host machine's user-data dir.

Capabilities (v1)

Action	How
Create	+ button or Cmd/Ctrl+N while a folder is open. Prompts for a title, slugifies it (Project Kickoff → project-kickoff), writes notes/<slug>.md with a # Title heading, registers the entry, opens it for editing.
Open	Click a row → loads the file into the active mode (Split / View / Edit).
Delete	Trash icon (revealed on hover) → confirm → registry entry removed and file unlinked.
Filter	Free-text input filters the list against title + tags, case-insensitive substring.
Sort	Most recently updated first (auto).

The list shows title + updated date + tag chips per row.

IPC surface

Channel	Signature
mid:notes-list	(workspace) → NoteEntry[]
mid:notes-create	(workspace, title) → { entry, fullPath }
mid:notes-rename	(workspace, id, title) → NoteEntry | null
mid:notes-delete	(workspace, id) → boolean
mid:notes-tag	(workspace, id, tags) → NoteEntry | null

Slug collisions are auto-suffixed (note-2, note-3, …). Missing registry file is treated as empty list (first-time write creates .mid/).

Out of scope (follow-up)

• Tag editor UI — the IPC + persistence are wired, but the renderer doesn't yet expose a way to edit tags interactively. Add when there's UX for it (e.g. inline chip editor on the active note).
• Full-text content search — current filter only checks title + tags. Wiring packages/core/src/search/searcher.ts would let it span note bodies.
• Wikilink-aware rename — renaming a note via the Notes panel doesn't currently rewrite [[wikilink]] references in other notes. The resolver in packages/core/src/wikilinks/resolver.ts could do this; tracked separately.

Files

• apps/electron/main.ts — registry CRUD (readNotes, writeNotes, slugify, IPC handlers).
• apps/electron/preload.ts — bridges (notesList / notesCreate / notesRename / notesDelete / notesTag).
• apps/electron/renderer/index.html — Files/Notes toggle, notes header, notes list container.
• apps/electron/renderer/renderer.ts — setSidebarMode, loadNotes, renderNotes, renderNoteRow, openNote, promptCreateNote, deleteNote, Cmd/Ctrl+N accelerator.
• apps/electron/renderer/renderer.css — .mid-sidebar-mode*, .mid-notes-list, .mid-note-row, .mid-note-tag, .mid-note-delete.

Verifying

1. npm run dev:electron, open this repo as a folder.
2. Click the Notes tab in the sidebar — empty state ("No notes yet…").
3. Cmd+N → enter "Test note" → a notes/test-note.md is created with a # Test note heading.
4. Type some content. Type "test" in the filter — the row stays. Type "xyz" — no matches.
5. Hover the row, click the trash icon → confirm → file is deleted from disk and registry.
6. Quit and relaunch — the registry persists if it had any rows when you closed.