0.2.0 — Version Display + Auto-Update

Added: kandown -v / --version flag — prints the current CLI version.
Added: Version displayed in CLI help banner, TUI settings header, and web app Settings "About" section.
Added: Web app Settings now has an "About" section showing current version and a manual update check against the npm registry.
Changed: CLI auto-update now runs before every command (not just kandown with no args). If a new version is found, runs npm install -g kandown and respawns — no prompt, no ask.
Changed: kandown help shows the current version in the banner.
Added: Bracket tags (e.g. [optimization]) in task titles are now rendered bold next to the task ID on board cards.
Added: scripts/inject-version.js — generates src/lib/version.ts at build time from package.json version. package.json is the single source of truth for version.