v0.3.0: rendering pass, generated props, selection model and Web build

Rendering and presentation
- Shared surface-material module (src/game/materials.gd) with per-surface
  roughness/metallic/uv profiles; ACES tonemapping, glow, fog and phase-driven sky
  energy. WorldBuilder rebuilt on those profiles with facade windows that light up,
  door trim/handles, curb, lane dashes, bollards, bench, bin and planter foliage.
- NPC silhouettes: per-role clothing palettes, caps/hoods/backpacks/sunglasses,
  hands and shoes, arm/leg walk swing.
- Six generated low-poly GLB props (bollards, bench, bin, planter, newspaper box,
  hydrant) built by tools/model_pipeline.py, loaded by WorldBuilder with a
  procedural fallback; ADR-0012.

Selection and movement
- Focus ranking by view angle then distance (NpcFocus.rank_indices); Tab and the
  mouse wheel cycle nearby people initially, right click clears focus with a
  re-acquire grace, HUD shows the candidate count, Shift walks at half speed.
  ADR-0011. Windowed smoke extended to cover wheel cycling and clearing.

QA tooling
- screen_designs.py catalogue grown to 19 screens (8 scene, 11 UI) plus a `list`
  subcommand; draft generation keeps existing AI references unless --force.

Web export
- New Web preset using the non-threaded Godot template (static hosting, no
  COOP/COEP). tools/build_releases.sh exports build/web and packages
  build/step-line-web-<ver>.zip; publish_release.sh uploads it with the desktop
  artifacts. test_web_export.gd covers the preset and release wiring.

Verification
- Headless suite 177 -> 181, Python tooling 53 tests, all eight smokes pass
  (including the windowed focus/wheel smoke). Web bundle serves index.html,
  index.wasm (35 MB) and index.pck (30 MB) with HTTP 200 from a static server.
- Version 0.3.0; README, PLAN, RELEASING, TODO/DONE and MEMORY updated.

content/strings.en.json

@@ -1,5 +1,5 @@
 {
-  "hud.controls": "LMB/Space wheel · A/D step · Space confirm · Esc cancel · R emergency · E inspect · C wand · Q polite · B camera · Tab cycle · G light · L lock · F debug",
+  "hud.controls": "LMB/Space wheel · A/D step · Space confirm · Esc cancel · R emergency · E inspect · C wand · Q polite · B camera · Tab/wheel cycle · Shift slow · G light · L lock · F debug",
   "radial.raise_hand": "Stop",
   "radial.eye_contact": "Look",
   "radial.point": "Point",
@@ -16,7 +16,7 @@
   "hud.cooldown": "EMERGENCY RADIO COOLDOWN: %.0fs",
   "hud.aim_first": "Aim at someone first.",
   "hud.no_one_nearby": "No one nearby.",
-  "hud.targeting": "Targeting %s (Tab to cycle).",
+  "hud.targeting": "Targeting %s (Tab or mouse wheel cycles).",
   "hud.no_wand": "No wand at this venue.",
   "hud.screen_first": "Screen this guest with the wand (C) before admitting them.",
   "access.granted": "Entry granted: %s",
@@ -85,5 +85,6 @@
   "timeline.next": "Next ▶",
   "timeline.close": "Close",
   "timeline.hint": "Left/Right step through events · Esc closes · no live replay yet",
-  "review.timeline_button": "Body camera timeline"
+  "review.timeline_button": "Body camera timeline",
+  "hud.nearby": "%d nearby · Tab or mouse wheel cycles targets"
 }