fix(live-room): restore mouse wheel scrollback

[spytensor]

Summary

• Align active project truth sources after v0.9.19: AGENTS.md, TASKS.md, PR/issue templates, development docs, and source-repo ignore rules.
• Add scripts/check-project-truth.py plus a CI project truth job to catch future version/tracker/path drift.
• Fix the live-room mouse-wheel history regression by enabling mouse capture by default again, with COREROOM_MOUSE_CAPTURE=0 as the opt-out.

Architecture impact

• No change — follows the existing live-room scrollback and CoreRoom truth/evidence model.
• Refines an open question.
• Amends a locked decision.

Linked issues

none — direct user-scoped maintenance and bugfix request in CoreRoom thread th-19e67d13314-7.

Acceptance criteria

• Active worker guidance no longer names v0.8/v0.8.0 - CoreRoom Console Data Plane Tracker #238 as current work.
• PR and issue templates reference the current .coreroom/ state path and no-active-tracker policy.
• Source repo ignores local .coreroom/ dogfood state while preserving legacy .coderoom/ ignore.
• Project truth drift check runs in CI.
• Mouse wheel events are captured by default so Room history scrolls inside the TUI.
• Users can opt out of mouse capture with COREROOM_MOUSE_CAPTURE=0.

Test plan

• python3 scripts/check-project-truth.py
• python3 -m py_compile scripts/check-project-truth.py
• cargo fmt --all -- --check
• cargo test --lib write_enter_commands
• cargo test --lib mouse_capture
• cargo test --lib mouse_wheel
• cargo test --lib page_keys_scroll_by_half_a_viewport
• cargo test --lib scrolled_back
• cargo clippy --all-targets --all-features -- -D warnings
• git diff --check

Evidence packet

• WorkOrder: none; direct user-scoped maintenance/bugfix.
• Gate threads:
  • th-19e67817468-3 project truth alignment — closed with accepted-risk bypass for missing independent cross-model review.
  • th-19e67c99bf2-5 mouse-wheel scrollback regression — closed with accepted-risk bypass for missing independent cross-model review.
• Changed files:
  • .github/ISSUE_TEMPLATE/bug.yml
  • .github/PULL_REQUEST_TEMPLATE.md
  • .github/workflows/ci.yml
  • .gitignore
  • AGENTS.md
  • CHANGELOG.md
  • README.md
  • TASKS.md
  • docs/DEVELOPMENT.md
  • scripts/check-project-truth.py
  • src/console_room_runtime.rs
• Snapshot/fixture evidence: not applicable; no rendered layout/view-model fixture changed.
• Root cause for bugfix: v0.9.18 made mouse capture opt-in, so wheel events stopped reaching crossterm Event::Mouse and handle_mouse never adjusted Room scroll_offset.
• Risks: mouse capture can make terminal-native text selection less convenient; documented opt-out is COREROOM_MOUSE_CAPTURE=0.
• Rollback: revert this PR; keyboard scrollback remains available either way.
• Unverified items: manual real-terminal wheel smoke after merge is still recommended.

Tracker update

• Tracker issue: none; AGENTS.md currently says Primary tracker: none.
• Issue checkbox updated:
  • yes
  • no, reason: no active tracker / no linked issue.
• Milestone AC updated, if applicable:
  • yes
  • no, reason: no active milestone.
• Evidence Ledger row updated:
  • yes
  • no, reason: no active tracker.

Risk and rollback

• Risk: default mouse capture restores wheel scrolling but changes copy/selection ergonomics in some terminals.
• Rollback: revert the PR or set COREROOM_MOUSE_CAPTURE=0 for a session.

Out of scope

• No release version bump.
• No GitHub milestone closure or tracker editing.
• No redesign of scrollback layout, working cards, or keyboard navigation.