* feat: support multiple concurrent orchestrators with isolated worktrees
- Each orchestrator session gets a numbered ID ({prefix}-orchestrator-N)
and an isolated git worktree, replacing the single shared orchestrator
- reserveNextOrchestratorIdentity atomically reserves the next available
number and detects conflicting project prefix configurations early
- isOrchestratorSession / isOrchestratorSessionName accept optional
allSessionPrefixes for cross-project false-positive prevention
- getProjectPause and resolveGlobalPause track the longest active pause
across all concurrent orchestrators instead of returning the first found
- cleanupWorktreeAndMetadata helper used consistently on all failure paths
including post-launch; system prompt file included in cleanup
- pollBacklog, status.ts, ProjectSidebar, sessions page, global-pause,
project-utils, serialize, and sessions API route all pass
allSessionPrefixes to isOrchestratorSession
- Web sessions/[id]/page.tsx fetches project prefix map and passes it
through prefixByProjectRef to avoid stale closure in fetchProjectSessions
* fix: seed sseAttentionLevels from fresh sessions on full refresh
When scheduleRefresh dispatches a reset action, derive sseAttentionLevels
from the freshly fetched sessions using getAttentionLevel. This clears
phantom entries for removed sessions and seeds correct levels for new
sessions, preventing stale favicon color and attention counts until the
next SSE snapshot.
* fix: merge duplicate @/lib/types imports into single import statement
Combining the separate import type and value import from @/lib/types
into one import to satisfy the no-duplicate-imports lint rule.