chore(ai): log followup TODOs surfaced during impeccable pass

Two backlog entries surfaced while polishing the session screen:

- ConcludeSessionModal paused/escalated step forces a single-artifact
  choice (Ticket Notes / Client Update / Email Draft). Real escalations
  often need at least two of the three. Recommended shape: multi-select
  with smart pre-checks per outcome, parallel generation, per-result
  Copy / Post / Send actions. Feature work, deferred.

- bg-card-hover Tailwind class doesn't resolve in CommandPalette. The
  --color-bg-card-hover token generates bg-bg-card-hover (Tailwind v4
  takes the full token name minus --color-). Other call sites use the
  explicit hover:bg-[var(--color-bg-card-hover)] form that works; the
  CommandPalette classes silently produce nothing. Fix is two lines —
  swap to the explicit form, or add a --color-card-hover semantic
  mapping in index.css.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.ai/TODO.md

@@ -19,3 +19,7 @@ None selected. Pick from the backlog below or `03-DEVELOPMENT-ROADMAP.md`.
 - [ ] **Allow peer-tech to escalate a colleague's session.** Today `POST /ai-sessions/{session_id}/handoff` in [endpoints/session_handoffs.py:48](backend/app/api/endpoints/session_handoffs.py#L48) filters by `AISession.user_id == current_user.id`, so only the session owner can escalate. Real MSP shops have peer hand-offs: Junior A is on lunch, Junior B sees the session is stuck and should be able to escalate it. Auth tweak: switch from session-owner check to `require_engineer_or_admin` + same-account scope. Add a `handed_off_by` audit column (already exists on `SessionHandoff`) so the original-owner-vs-actual-escalator distinction is preserved. Surfaced from /plan-eng-review on the Escalation-Mode wedge plan; v1 wedge demo doesn't need this (solo-founder pilot), but capture for v2 once 3+ pilots are live and a peer-claim need surfaces.
 
 - [ ] **Mobile/responsive design for EscalationQueue + handoff-context screen.** Pre-PMF wedge demo targets desktop only — MSP techs work on laptops/desktops in shop environments. Once 3+ paying customers exist and a tech requests mobile (likely on-call use case), spec the responsive behavior: stacked card layout below `sm:` breakpoint, full-bleed handoff-context overlay on mobile, swipe-to-claim gesture instead of Pick Up button. Surfaced from /plan-design-review on the Escalation-Mode wedge plan.
+
+- [ ] **`bg-card-hover` Tailwind class doesn't resolve.** [`frontend/src/components/layout/CommandPalette.tsx:450-451`](../frontend/src/components/layout/CommandPalette.tsx) uses `bg-card-hover` as a Tailwind utility, but Tailwind v4 generates `bg-{token}` from `--color-{token}` — and the token in [`frontend/src/index.css:15`](../frontend/src/index.css) is `--color-bg-card-hover`, which generates `bg-bg-card-hover`, not `bg-card-hover`. So those classes silently produce nothing. Other call sites (KnowledgeBaseCards, TeamSummary, ProposalBanner) use the explicit `hover:bg-[var(--color-bg-card-hover)]` form which works. Fix: change the CommandPalette classes to the explicit-var form, OR add a `--color-card-hover` semantic mapping in index.css alongside `--color-card`. Surfaced 2026-05-01 during impeccable polish sweep.
+
+- [ ] **`ConcludeSessionModal` paused/escalated step forces single-artifact choice — should allow multi-select.** [`frontend/src/components/assistant/ConcludeSessionModal.tsx`](../frontend/src/components/assistant/ConcludeSessionModal.tsx) ~lines 430-474 ("Paused/Escalated: status update options"). Today the engineer clicks ONE of Ticket Notes / Client Update / Email Draft, the buttons disappear, and the result replaces them. Real MSP escalations almost always need at least two: technical notes for the next engineer's PSA AND a non-technical client update. Same for pause (client update + ticket notes for context when resuming). Recommended shape: multi-select with smart defaults — three checkboxes (`☑ Ticket Notes  ☑ Client Update  ☐ Email Draft`); for `escalated` pre-check Ticket Notes + Client Update; for `paused` pre-check Client Update only. One "Generate" button fires all selected in parallel via existing `aiSessionsApi.generateStatusUpdate(...)` (already supports the three `audience` values: `ticket_notes`, `client_update`, `email_draft`). Each result renders in its own card with its own Copy / Post-to-PSA / Send-Email action. Surfaced 2026-05-01. Feature work, not polish — touches streaming wiring for parallel calls.