Add game UI panels, keyboard shortcuts, docs narrative overhaul, and unified dev script

- Add MiniStarMap, NpcMarketPanel, ShipStatusPanel, useKeyboardShortcuts
- Add progress bars for approach/mining operations and cargo fill indicator
- Rewrite docs from spreadsheet-first to exploration-first open-world RPG
- Replace dev:db + dev:standalone with unified dev script (scripts/dev.sh)
- Add Vite chunk splitting for three.js and spacetimedb
- Fix displayName dependency in useSpacetimeConnection
- Remove stale usePlayerSession.ts
- Add AGENTS.md files across all packages

apps/game/src/scene/AGENTS.md

@@ -0,0 +1,24 @@
+# apps/game/src/scene/ — 3D Rendering (React Three Fiber)
+
+The 3D viewport for the game client. Renders the player's ship, surrounding space environment, stations, asteroids, and visual effects.
+
+## Files
+
+| File | Purpose |
+|------|---------|
+| `SpaceCanvas.tsx` | R3F Canvas wrapper. Fixed camera at [8,9,44], FOV 48. No user camera controls yet. |
+| `SpaceEnvironment.tsx` | Background (#040712), fog, ambient light, two point lights (cyan + amber), animated star field (3600 stars) |
+| `GameSpaceScene.tsx` | Main orchestrator. Renders stations, asteroid clusters, ship. Manages approach/mining operations. Interpolates ship position. Draws approach line (dashed cyan) and mining line (solid amber). Auto-completes operations via 120ms polling interval. |
+| `StationMesh.tsx` | Torus ring + cylinder core + crossbar. Clickable. Selection ring when targeted. |
+| `AsteroidMesh.tsx` | Icosahedron with tumble animation. Clickable. Selection ring when targeted. |
+| `ShipMesh.tsx` | Cone (hull) + box (wings) + sphere (engine glow). Engine glow changes by flight mode. Subtle bob + roll animation. |
+
+## Visual Gaps
+
+- No mining laser beam effect (flat Line only)
+- No warp/travel animation
+- No combat visuals (projectiles, shields, explosions)
+- No NPC/other player ships
+- No camera controls (orbit, zoom, pan)
+- No sun/star light source
+- No nebulae or system-specific skybox