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

AGENTS.md

@@ -1,6 +1,6 @@
 # VOID::NAV — Monorepo Root
 
-Single-player open-world space exploration RPG. Windward Horizon in space with FTL-style combat.
+Single-player narrative-driven space exploration saga. Windward meets Stellaris with AI-generated storytelling in the style of The Templin Institute.
 
 ## Directory Map
 
@@ -10,29 +10,26 @@ Single-player open-world space exploration RPG. Windward Horizon in space with F
 | `apps/game` | Playable game client — **Rust + Bevy** (independent of the JS/TS workspace) |
 | `apps/site` | Public landing page (Vite + React) |
 | `packages/ui` | Shared UI primitives and design tokens for the TS apps |
-| `services/spacetimedb` | SpacetimeDB TypeScript backend module (authoritative game state) |
 | `scripts/` | Dev tooling (dev.sh startup script) |
 | `archive/` | Legacy pre-monorepo files kept for reference |
 
 ## Key Files
 
-- `package.json` — pnpm workspace scripts (`dev`, `build`, `check`, `generate:bindings`)
+- `package.json` — pnpm workspace scripts (`dev`, `build`, `check`)
 - `pnpm-workspace.yaml` — workspace glob patterns (covers TS apps only)
-- `spacetime.json` — SpacetimeDB module path and binding generation config
 - `tsconfig.base.json` — Shared TypeScript config (ES2020, React JSX) — does not apply to `apps/game`
 - `apps/game/Cargo.toml` — Rust manifest for the game binary
 
 ## Commands
 
-### JS/TS workspace (docs, site, packages/ui, services)
+### JS/TS workspace (docs, site, packages/ui)
 
 ```bash
-pnpm dev                # Full stack: SpacetimeDB + docs/site
+pnpm dev                # Docs + site servers
 pnpm dev:docs           # Docs only (port 5173)
 pnpm dev:site           # Site only (port 5174)
 pnpm build              # Build all TS packages
 pnpm check              # Typecheck all TS packages
-pnpm generate:bindings  # Regenerate SpacetimeDB TypeScript bindings
 ```
 
 ### Rust game (`apps/game`)
@@ -47,13 +44,11 @@ cargo clippy            # Lint
 
 ## Architecture Notes
 
-- **Two independent toolchains coexist**: the pnpm/TS workspace (docs, site, UI lib, SpacetimeDB backend) and the Cargo/Rust game client. They share no code.
-- **SpacetimeDB** remains the authoritative persistence layer. The game client will connect to it via the SpacetimeDB Rust SDK when wired up (TS bindings generated by `pnpm generate:bindings` are consumed by the docs prototype, not the game).
+- **Two independent toolchains coexist**: the pnpm/TS workspace (docs, site, UI lib) and the Cargo/Rust game client. They share no code.
+- **V1 is single-player** with local persistence. Future multiplayer servers will be added as an optional enhancement.
 - **Naming follows RFC 344**: see `apps/game/AGENTS.md` for Rust/Bevy conventions.
 
 ## Conventions (TS apps)
 
-- SpacetimeDB is the persistence layer from day 1 — no localStorage for game state in the docs prototype
 - TS apps use Tailwind CSS v4 with custom design tokens from `packages/ui`
 - 3D rendering in `apps/docs` uses React Three Fiber + Drei + Three.js
-- Module bindings are auto-generated — never edit generated bindings by hand