Unify action-button states across the UI

- Add UiStyles with explicit normal, hover, pressed, focus and disabled styles and apply it to every action button.
- Disable timeline Previous/Next at the first/last event and keep Close always available.
- Style settings reset-dialog buttons and cover the button-state audit in docs/ui-copy.md.
- Add shared-state and timeline-boundary regression tests.

docs/development-status.md

@@ -5,7 +5,7 @@ Implemented so far:
 - Godot 4.7.2 project scaffold, input map, procedural world builder (CI/local/release unified)
 - Venue-driven simulation core: `ShiftCoordinator`, `VenueScenario`, `EventScheduler`, `NPCController` + FSM, `AccessVerifier`, `EscalationManager`, `RadioSystem`, `IncidentRecorder`, `ReputationEvaluator`, `CrowdSystem`
 - Three authored scenarios (El Capitan Entertainment Centre / Hollywood Boulevard, The Joke Shop, Late Night TV Studio) with access policies, NPC archetypes, and event pools
-- Headless unit tests: **258 passing** (access rules and venue-correct access loadout, escalation, radio cooldown/battery, NPC reaction determinism, door lock, flashlight perception, persistence round-trip, settings round-trip, input remaps, navmesh, step colliders, skyline alpha, scenario data, full-shift simulation, wand screening, responder dispatch, localization strings, focus cone, action wheel, session shell, PLAN verbs and incident recording, crowd presentation, emergency aftermath, body-camera timeline, NPC theater poses, audio, accessibility, authored scenario content, string formatting, `.tres` venue round-trip, surface materials and environment, focus ranking and outfit/gait helpers, generated prop models, web export preset, prop atlas material, player movement, NPC character layers/LOD/queue, input bindings)
+- Headless unit tests: **259 passing** (access rules and venue-correct access loadout, escalation, radio cooldown/battery, NPC reaction determinism, door lock, flashlight perception, persistence round-trip, settings round-trip, input remaps, navmesh, step colliders, skyline alpha, scenario data, full-shift simulation, wand screening, responder dispatch, localization strings, focus cone, action wheel, session shell, PLAN verbs and incident recording, crowd presentation, emergency aftermath, body-camera timeline, NPC theater poses, audio, accessibility, authored scenario content, string formatting, `.tres` venue round-trip, surface materials and environment, focus ranking and outfit/gait helpers, generated prop models, web export preset, prop atlas material, player movement, NPC character layers/LOD/queue, input bindings)
 - Simulation extras: protester archetype, CALL_SOMEONE reaction, door lock/secure mechanic (visual indicator), flashlight with night perception bonus, LATE shift phase reaching the violent-threat event
 - First-person prototype with interaction HUD, access inspection, wand screening, radio report form (incl. emergency hold-to-confirm), dispatched responder avatars, aim-free targeting, venue cycling between all three scenarios, color-coded escalation feedback, procedural audio cues, navigation-mesh NPC paths, JSON-backed localized strings, persisted shift history, debug overlay, and shift review
 - Control pass: focus cone on NPC heads with a billboarded blue circle in front of the face and name, action wheel (LMB/Space) with de-escalation-first slices, mouse-look freeze while a panel is open, acceleration-based walking, and named input actions (`action_menu`, `confirm`, `cancel`, `inspect`, `wand`)
@@ -51,6 +51,7 @@ Implemented so far:
 - Joke Shop / Sunset Strip map (map optimization): the second venue is now a stylized reconstruction of The Comedy Store block at 8433 Sunset Blvd, with a 27 m black hall, signature-covered sloping canopy, circular **THE JOKE SHOP** blade sign, red velvet curtain bays, a west-end entrance, cream and white low-rise neighbours, a dry hillside with stucco houses and palms behind the roofline, and a low retail/billboard frontage across Sunset. The same geometry serves day and late lighting through the phase system. Real-site references and limits are in [`joke-shop-map.md`](joke-shop-map.md); the map measures **22,680 triangles across 454 meshes** in the budget test.
 - Venue geometry (v0.7.0, Joke Shop frontage superseded by the map-optimization pass): the TV Studio builds a stone facade, bulb canopy, glossy black car and barrier line. `WorldBuilder.VENUE_SPECS` drives facade/street/nav dimensions, and `GameManager` rebuilds only the world container when the venue changes.
 - Gear fit (post-v0.6.0): Blender gear is measured against the avatar head/skirt silhouette and the checks run in both the Python tooling and the headless suite. Sunglasses, the shoulder bag and the firefighter helmet were fitted to the new faces; the Influencer portrait and gallery were recaptured with a before/after report.
+- Button-state pass (0.9.3 work): a shared `UiStyles` helper now gives every action button explicit normal, hover, pressed, focus and disabled styles; the timeline disables Previous/Next at its boundaries, while hidden continue states and the keyboard-only tutorial skip remain intentional. Recorded in `docs/ui-copy.md`.
 - Dialogue pass (0.9.3 work): NPC reason answers now use the authored `reason` context, with an in-character answer for every shared archetype; Hollywood and Studio gained door-staff lines; radio cancellation, tutorial Ask terminology, help, start hints and campaign reset copy were clarified. Audit recorded in `docs/ui-copy.md`.
 - Pre-build NPC review (2026-11-02): all eight library characters were staged at portrait, conversation and crowd distance on Hollywood and the Joke Shop, in day and night lighting, with the normal crowd hidden (`src/test/capture_npc_review.gd`). No P0 issues were found. Two P1 gear-fit issues were fixed with runtime attach offsets: the authorized-guest lanyard badge now clears the jacket and the firefighter helmet sits above the eyes. Backpack straps, caps, hands and the intentionally low-poly faces were accepted for the stylized target; close-range flashlight wash remains an optional-lighting follow-up. The 24-NPC budget stayed at 6.93 ms, the gallery passed 13 good / 0 bad and the screen-design judge stayed 13/13, and a clean portrait scored a 0.732 vision gap against the photoreal concept.