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/site/vite.config.ts

@@ -7,4 +7,23 @@ export default defineConfig({
     jsx: "automatic",
     jsxImportSource: "react",
   },
+  build: {
+    // Generate source maps for production debugging
+    sourcemap: true,
+    // Optimize chunk splitting for better caching
+    rollupOptions: {
+      output: {
+        manualChunks: {
+          // Bundle React separately (more stable across updates)
+          "react-vendor": ["react", "react-dom"],
+        },
+      },
+    },
+    // Chunk size warning limit (in kB)
+    chunkSizeWarningLimit: 500,
+  },
+  // Optimize dependency pre-bundling
+  optimizeDeps: {
+    include: ["react", "react-dom"],
+  },
 });