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.

docs/gameplay.md

@@ -16,7 +16,7 @@ A typical shift lasts 10–15 minutes. The player:
 
 The game rewards calm resolutions rather than aggressive behavior. Emergency assistance and armed responders are rare last-resort systems with meaningful consequences.
 
-The first shift starts with an in-game tutorial covering movement/look, focus cycling, the action wheel, access inspection, polite direction, formal warning/body camera, radio and shift review. Its beat sheet is in [`tutorial.md`](tutorial.md).
+The first shift starts with an in-game tutorial covering movement/look, focus cycling, the action wheel, access inspection, polite direction, formal warning/body camera, radio and shift review. Its beat sheet is in [`tutorial.md`](tutorial.md). After that a short campaign runs Hollywood → Joke Shop → TV Studio; progress, difficulty and a pause-safe checkpoint are persisted locally. Help (from the venue menu) explains the controls and the current venue policy.
 
 ## Venues