Replace the in-vault ui.config.md file with localStorage persistence
keyed by vault path. Vaults now contain only user content — no app
config files. Removes the Rust vault_config module, Tauri commands
(get/save_vault_config), startup migrations, and demo vault config files.
The reactive store (vaultConfigStore) and consumer hooks (useZoom,
useViewMode, useRawMode) are unchanged — only the storage backend moved.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add VaultConfig infrastructure (store, hook, migration) that persists
zoom, view mode, section visibility, tag/status colors, and property
display modes to config/ui.config.md in the vault instead of localStorage.
- New vaultConfigStore module with subscribe/notify pattern
- useVaultConfig hook loads config via Tauri, binds store, runs migration
- One-time silent migration from localStorage on first load
- Config type excluded from note search and unified search
- All hooks/utils updated to read/write through vault config store
- Tests updated to use vault config store instead of localStorage mocks
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
