OpenMarkdownReader v1.0.5

docs: add contributor onboarding + handoff ticket list

CONTRIBUTOR-ONBOARDING.md walks a new contributor from clone to first
PR: setup, project layout, branch convention, beads usage, agent-native
design principle, build/release commands.

HANDOFF-LIST.md categorizes the 23 open tickets into:
- Ready to claim cold (small + medium scope, no design questions)
- Needs Jacob's input first (architectural/UX decisions)
- Don't touch (parking tickets, P4 backlog)

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

fix: knock out batch of obvious open tickets

- Cmd+P tilde expansion (d12): main.js open-file-by-path now expands
  ~/foo to home dir, fixes all 18 callers in one shot.
- Sidebar Collapse All (r12): new toolbar button + collapseAllFolders()
  helper that clears expandedFolders and re-renders the tree.
- Per-build incrementing build numbers (hjc): generate-build-info.js
  now reads previous buildNumber and uses max(gitCount, prev+1), so
  two builds of the same commit get distinct numbers.
- Build number visible in titlebar on packaged builds (hjc): the dev
  badge now shows "b<n>" as a subtle gray pill on packaged installs,
  full details in tooltip. No more "which v1.0.4 am I on?" guessing.

Also closes (verified already fixed in earlier commits):
- Wikilink resolver (ie3) — fixed in fbed0e8
- Chat code fence corruption (av2) — fixed in fcd87e9

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

Add auto-update support via electron-updater

Checks for updates on launch and adds "Check for Updates..." menu item
(macOS app menu / Windows Help menu). Downloads are automatic; prompts
user to restart when ready.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Add auto-update support via electron-updater

Checks for updates on launch and adds "Check for Updates..." menu item
(macOS app menu / Windows Help menu). Downloads are automatic; prompts
user to restart when ready.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Add auto-update support via electron-updater

Checks for updates on launch and adds "Check for Updates..." menu item
(macOS app menu / Windows Help menu). Downloads are automatic; prompts
user to restart when ready.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

feat: Sidebar improvements and quit with unsaved changes fix

- Add New File button (+) to sidebar header for quick file creation
- Add double-click to rename files in sidebar file tree
- Fix crash when quitting with unsaved changes by adding isDestroyed() checks
- Change "Save" to "Save All" when closing window with multiple unsaved files
- Add save-all IPC handler to save all modified tabs at once

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

chore: add electron-builder config and macOS icon

- Configure electron-builder for DMG and ZIP packaging
- Create universal macOS builds (ARM + Intel)
- Add .icns icon file for macOS
- Configure file associations for .md, .markdown, .mdown
- Move electron to devDependencies

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>