Detailed graphics pass: authored textures, humanoid NPCs, HUD feedback, asset pipeline

- tools/generate_textures.py (deterministic PIL) produces all authored PNGs:
  brick facade, concrete, asphalt, awning, skyline, vignette, HUD icons,
  access-card art (all <=1024px, power-of-two)
- WorldBuilder: textured facade/glass door/sidewalk/asphalt, striped awning
  with 'STEP LINE', generated skyline backdrop planes
- GameManager: soft sun shadows (4-split parallel); guard in 'guard' group
- NPC avatars: humanoid rig (torso/head/limbs) with archetype props (camera,
  delivery box, performer hat, protest sign, tourist backpack), procedural
  walk bob, head-turns-toward-guard attention cue
- HUD: inspection artifact cards, mode icons (flashlight/door/wand),
  per-escalation vignette, body-camera overlay (corner brackets + REC + clock)
- assets/ import convention documented; test_asset_textures_present_and_pow2
  guards the pipeline (57 tests pass)
- README tech stack updated for Gitea Actions + asset pipeline; screenshot
  gallery regenerated (day + night)

TODO.md

@@ -50,28 +50,28 @@ The prototype is entirely procedural `BoxMesh` with flat `StandardMaterial3D` co
 
 ### Environment
 
-- [ ] Replace flat facade boxes with textured materials: brick/concrete facade, glass door, awning with a readable sign (generate facade + sign textures).
-- [ ] Add a sidewalk concrete texture and street asphalt texture with a center-line decal (generate seamless textures).
-- [ ] Add a sky: `ProceduralSkyMaterial` or a generated skybox, plus a sun with soft shadows (currently a bare `DirectionalLight3D` + flat ambient).
-- [ ] Add simple props for depth: bollards, a trash can, a street lamp, a planter near the entrance (generate or model low-poly props).
-- [ ] Add a night/evening lighting pass: dim ambient, warm street-lamp point lights, and a visible flashlight cone (ties into the existing `G` flashlight toggle).
+- [x] Replace flat facade boxes with textured materials: brick/concrete facade, glass door, awning with a readable sign (`tools/generate_textures.py` → `assets/textures/`).
+- [x] Add a sidewalk concrete texture and street asphalt texture with center dashes (seamless PNGs).
+- [x] Add a sky: `ProceduralSkyMaterial` + generated skyline backdrop planes + soft sun shadows (4-split parallel).
+- [x] Add props for depth: street lamps (emissive bulbs + omni lights), planters, low-poly trees (bollards/trash can still optional).
+- [x] Add a night/evening lighting pass: dim ambient, warm street-lamp point lights, marquee glow, flashlight cone (`G`).
 
 ### NPCs
 
-- [ ] Replace capsule bodies with a simple humanoid rig (head/torso/limbs) or a low-poly character mesh, keeping the archetype color coding as a fallback.
-- [ ] Add per-archetype visual identity: distinct silhouettes or accessories (e.g. camera for influencers, delivery box, performer prop) instead of color-only.
-- [ ] Add a simple walk/idle animation (procedural bob or imported animation) so NPCs don't glide.
-- [ ] Add a facing/attention cue: NPC head turns toward the guard when `perceive_guard` reports `aware`/`near`.
+- [x] Replace capsule bodies with a simple humanoid rig (torso/head/limbs) keeping the archetype color coding as the base.
+- [x] Add per-archetype visual identity: camera (influencer), delivery box, performer hat, protest sign, tourist backpack.
+- [x] Add a simple procedural walk animation (body bob + lean) so NPCs don't glide.
+- [x] Add a facing/attention cue: NPC head turns toward the guard once `perceive_guard` raises awareness.
 
 ### UI and feedback
 
-- [ ] Replace text-only inspection with visual artifact cards: wristband/ID/ticket images showing color, pattern, date, and event marking (generate card art).
-- [ ] Add HUD icons for the tone picker, wand, flashlight, and door-lock states (generate small icons).
-- [ ] Add a subtle screen-space vignette or color grade per escalation level to reinforce the existing color-coded escalation label.
-- [ ] Add a body-camera frame overlay (corner timestamp + REC indicator) to sell the evidence/recording fantasy.
+- [x] Replace text-only inspection with visual artifact cards (ID/wristband/ticket/credential/guest-list card art + tooltips).
+- [x] Add HUD icons for wand, flashlight, and door-lock states (small white PNGs); tone-picker icon was removed with the tone system.
+- [x] Add a screen-space vignette tinted per escalation level.
+- [x] Add a body-camera frame overlay: corner brackets, REC indicator, and a running shift clock.
 
 ### Performance and pipeline
 
-- [ ] Set up an `assets/` import convention (textures, materials, meshes) and document it in `README.md`.
+- [x] Set up an `assets/` import convention (≤1024px, power-of-two) and document it in `README.md`; assets generated by `tools/generate_textures.py` (deterministic, PIL).
 - [ ] Profile the crowd: ensure textured materials and props don't hurt the target frame rate around a busy entrance.
 - [ ] Add LOD or culling for distant NPCs/props if the crowd grows.