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/App.tsx

@@ -17,7 +17,7 @@ import { DemoGalleryPage } from "./pages/docs/DemoGalleryPage";
 import { GapAnalysisPage } from "./pages/docs/GapAnalysisPage";
 import { VerticalSliceEvaluationPage } from "./pages/docs/VerticalSliceEvaluationPage";
 import { DesignDocPage } from "./pages/docs/DesignDocPage";
-import { TodoPage } from "./pages/docs/TodoPage";
+import { KanbanBoardPage } from "./pages/docs/KanbanBoardPage";
 import { StarMapDemo } from "./prototypes/existing-demos/StarMapDemo";
 import { ShipMovementDemo } from "./prototypes/existing-demos/ShipMovementDemo";
 import { WarpTravelDemo } from "./prototypes/existing-demos/WarpTravelDemo";
@@ -57,7 +57,7 @@ export function App() {
         <Route path="gap-analysis" element={<GapAnalysisPage />} />
         <Route path="vertical-slice-evaluation" element={<VerticalSliceEvaluationPage />} />
         <Route path="design-doc" element={<DesignDocPage />} />
-        <Route path="todo" element={<TodoPage />} />
+        <Route path="kanban-board" element={<KanbanBoardPage />} />
 
         <Route path="demos/starmap" element={<StarMapDemo />} />
         <Route path="demos/game-loop" element={<GameLoopSliceDemo />} />