chore: sync codebase remediation, gameplay systems, and docs

Security & infrastructure:
- Remove unused services/ (auth, spacetimedb) and auth.db
- Add .env.example template, expand .gitignore for env/db files
- Add GitHub Actions CI + commitlint config and workflows
- Add manual vendor chunking and source maps to docs/site vite configs

Shared UI & docs app:
- Add ARIA props and focus-visible rings to Button/Panel
- Add ButtonAsLink primitive; use shared Button in NotFound
- Wire @void-nav/ui into docs app; refresh content pages
- Replace Todo page with Kanban board

Gameplay (Bevy):
- Add ai module (behavior, faction, navigation, perception, spawning, states)
- Add narrative module (events, history, synthesis, ui)
- Refine galaxy contents and in-system flight/scene systems

apps/docs/src/data/nav.ts

@@ -24,7 +24,7 @@ export const navSections: NavSection[] = [
       { path: "/docs/social", icon: "✧", label: "Progression & World" },
       { path: "/docs/ship-ai", icon: "◈", label: "Ship AI - Zora" },
       { path: "/docs/roadmap", icon: "⊞", label: "Roadmap" },
-      { path: "/docs/todo", icon: "⊡", label: "Implementation Status" },
+      { path: "/docs/kanban-board", icon: "▦", label: "Implementation Board" },
       { path: "/docs/risks", icon: "◬", label: "Risks & Questions" },
       { path: "/docs/gap-analysis", icon: "□", label: "Gap Analysis" },
       { path: "/docs/vertical-slice-evaluation", icon: "▤", label: "Slice Evaluation" },