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/smoke-checklist.md

@@ -32,4 +32,8 @@
 30. The shift review's "Body camera timeline" button steps through the recorded events (Left/Right or the buttons) and Esc returns to the review.
 31. The escalation label shows a `[###--] L3/5` shape meter as well as the level name, and stays readable in grayscale.
 32. Changing "HUD font scale" in Settings resizes the HUD text and persists across a restart.
-33. When the shift timer reaches 0, the shift review screen shows grade, incident summary, responder outcomes, investigations, and persisted shift history; "Run another shift" returns to the venue menu.
+33. When the shift timer reaches 0, the shift review screen shows grade, policy, incident summary, responder outcomes, investigations, and persisted shift history; campaign Continue starts the next venue.
+34. On a fresh profile the tutorial starts on Hollywood, advances through its eight beats, and F1 skips it; Settings Replay tutorial restarts it.
+35. Pausing saves a checkpoint: returning to the menu and choosing Continue resumes elapsed time, NPCs, incidents, door/flashlight state and campaign position.
+36. Settings difficulty changes spawn pacing/compliance/report strictness while escalation rules stay the same; Help filters controls and shows the venue policy.
+37. The F debug overlay lists the next eligible events; recovery events and recently played scripted events behave as authored.