Ship the 0.8.0 first-hour and campaign milestone

Add the campaign shell, pause-safe checkpoint resume, post-shift campaign
continue, confirmed campaign reset, difficulty presets, searchable Help,
content-matrix validation, recovery events, contextual dialogue, policy/debrief
context and eligible-event previews. Extend persistence with atomic separate
files and add campaign/checkpoint/tutorial smokes. Headless 247/247, Python
94/94, tutorial/campaign/session/scenario smokes green.

MEMORY.md

@@ -43,6 +43,7 @@ Session memory for durable decisions, state, and gotchas. Keep concise, remove o
 - RNG: NPC reactions and event scheduling are seedable for deterministic tests.
 
 - **Mouse look (v0.7.3):** guard look is handled in `GuardController._input()` (before GUI), not `_unhandled_input`; focus/click-back recaptures the cursor and the HUD is made mouse-transparent recursively. Regression tests cover yaw/pitch and HUD filters.
+- **Campaign/v0.8.0:** `Campaign` owns Hollywood → Joke Shop → TV Studio progression. `campaign.json`, `shift_results.json`, `settings.json` and versioned `shift_state.json` persist separately; pause saves a checkpoint, review Continue advances, Settings resets with confirmation. Difficulty keys are `easy/normal/hard` (`ai_difficulty`); scripted QA bypasses tutorial unless `--tutorial` is passed. Help is searchable and generated from `InputBindings.REMAPPABLE`.
 - **Tutorial (0.8.0 work):** `docs/tutorial.md` is the eight-beat design; `src/game/tutorial.gd` is the pure state machine, `TutorialOverlay` is the non-blocking card, and `GameManager` wires it with a safe visitor, suppressed spawns, persisted completion/skip and Settings replay. Scripted test/capture runs bypass it unless `--tutorial` is passed; `smoke_tutorial.gd` covers completion/replay/skip.
 - **Documentation ownership (2026-11-01):** `docs/architecture.md` §12 defines the source-of-truth map and consolidation rules. Obsolete/historical plan documents are removed rather than kept; current work belongs in `TODO.md`. README/development-status/Blender AO/Forward+ stale claims were corrected. The v1.0.0 gap register and 0.8/0.9/0.9.5/1.0 roadmap live in `TODO.md`.
 - **Vision judge (v0.7.2):** `tools/openrouter_judge.py` reads `/api/v1/models`, filters image-input models with `response_format`, and ranks by advertised prompt/image/completion prices. `--model auto` (default) uses the cheapest (`z-ai/glm-5.3-flash` on 2026-11-01) with fallbacks; explicit `--model`/`GIG_LINE_JUDGE_MODEL` wins. Auth errors abort, provider/model errors fall through. Full screen judge 13/13 match, 0 diff; A/B judge ~$0.006.