chore: check in pending work — queue preferences, QBO AR diagnostics, mobile engagement fixes, ops scripts

Bundles several in-progress efforts that were sitting uncommitted:
- User queue-preferences (migration 087, API route, popover component)
- QBO invoice soft-delete (migration 088) and AR diagnostics route
- Dashboard/mobile engagement route and page adjustments
- Docker Compose log-rotation config
- One-off ticket/RMM investigation scripts (scripts/)
- Planning docs: phase verification/pattern notes, mobile shell design spec
- .gitignore: exclude local scratch financial/inventory data and Claude Code
  worktree/local-settings runtime state (never meant for version control)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01W6RuWdiUiXrPK6FLBHjtpY

.gitignore

@@ -44,3 +44,14 @@ routes.ts
 
 # fonts
 *.woff2
+
+# local scratch data (real customer/financial data — never commit)
+dev/fin/
+dev/seubert-laptops.csv
+
+# Claude Code local runtime state — agent worktree checkouts, personal
+# permission overrides, and the scheduler lock are per-machine, not project
+# config. .claude/skills/ (project skills) is intentionally NOT ignored.
+.claude/worktrees/
+.claude/settings.local.json
+.claude/scheduled_tasks.lock