feat: FlowDeck v0.2.0 — Kanban Gitea intégré

- Dashboard projets Gitea (user + orgs)
- Board Kanban 5 colonnes avec drag & drop (SortableJS)
- Sync bidirectionnelle colonnes ↔ labels Gitea
- Filtres milestone/label/assignee
- Notes Markdown par projet
- API REST (/api/health, /api/move, /api/col-mapping…)
- Colonnes custom, WIP limits
- Thème clair/sombre
- Cache Gitea TTL
- Docker + docker-compose
- Tests pytest
- Docs: README, ARCHITECTURE, CHANGELOG, ROADMAP

static/js/app.js

@@ -0,0 +1,12 @@
+// FlowDeck — Theme toggle
+(function() {
+  const saved = localStorage.getItem('flowdeck-theme');
+  if (saved) document.documentElement.setAttribute('data-theme', saved);
+})();
+
+function toggleTheme() {
+  const current = document.documentElement.getAttribute('data-theme');
+  const next = current === 'light' ? 'dark' : 'light';
+  document.documentElement.setAttribute('data-theme', next);
+  localStorage.setItem('flowdeck-theme', next);
+}