feat(workspaces): star toggle for concurrency priority

Backend (feature/workspace-star) shipped Workspace.starred: boolean (additive
to [email protected], no version bump) + PUT/DELETE /workspaces/:id/star endpoints
(no body; create-on-miss; return the updated Workspace). A starred workspace's
agents jump ahead of non-starred ones in the concurrency limiter queue
(oldest-agent-first within each group); takes effect immediately for
already-queued agents.

FE consumed:
- adapter/http.ts: star(id)/unstar(id) -> WorkspaceResult<Workspace>
  (PUT/DELETE /workspaces/:id/star, no body).
- logic/view-model.ts: pure sortWorkspaces (starred-first, then lastActivityAt
  desc, stable) + pure applyStarred (the optimistic apply/revert transform).
- store.svelte.ts: setStarred(id, starred) — optimistic flip with error revert;
  the list is now a $derived sorted view (starred bubble to top reactively);
  no full refresh on success (avoids flicker).
- ui/WorkspaceCard.svelte: star toggle button (filled gold when starred,
  outline when not; spinner in flight; aria-pressed/aria-label; tooltip notes
  concurrency priority).
- Re-mirrored .dispatch/wire.reference.md (starred + delta note).
- GLOSSARY.md: 'starred' term.

Tests (+27): http star/unstar (5), view-model sort+applyStarred (12), store
optimistic+revert+re-sort (6), WorkspaceCard star button (4).

Verification: typecheck 0/0, 1045 tests green, biome clean, build OK.
backend-handoff.md updated (workspace-star slice, no open backend asks).

1 files changed, 14 insertions, 0 deletions

diff --git a/.dispatch/wire.reference.md b/.dispatch/wire.reference.md
index 888c160..b430a45 100644
--- a/.dispatch/wire.reference.md
+++ b/.dispatch/wire.reference.md
@@ -6,6 +6,13 @@
 >
 > **Orchestrator:** SNAPSHOT of `[email protected]` (workspaces + computers + provider-retry + concurrency-`queued` status). Regenerate whenever `@dispatch/wire` changes.
 >
+> **2026-06-27 delta (workspace starring — ADDITIVE to `[email protected]`, NO version bump):** `Workspace` gains a
+> required `starred: boolean` (defaults to `false` on creation). A starred workspace's agents receive
+> PRIORITY in the concurrency limiter queue — they jump ahead of agents from non-starred workspaces
+> (oldest-agent-first within each group). Toggled via dedicated `PUT`/`DELETE /workspaces/:id/star` endpoints
+> (no body; both create-on-miss and return the updated `Workspace`). `PUT /workspaces/:id` does NOT accept a
+> `starred` field. See `backend-handoff.md`.
+>
 > **2026-06-26 delta (provider concurrency — ADDITIVE to `[email protected]`, NO version bump):** `ConversationStatus`
 > widened to `"active" | "queued" | "idle" | "closed"`. `queued` = the turn is in flight but waiting for a
 > per-provider concurrency slot (broadcast-only via `conversation.statusChanged`, never persisted); the FE shows
@@ -708,6 +715,13 @@ export interface Workspace {
 	 * (per-conv `computerId` → this → `null`/local).
 	 */
 	readonly defaultComputerId: string | null;
+	/**
+	 * Whether the workspace is starred by the user. Starred workspaces receive
+	 * PRIORITY in the concurrency limiter queue — their agents jump ahead
+	 * of agents from non-starred workspaces (oldest-agent-first within each group).
+	 * Defaults to `false` on creation.
+	 */
+	readonly starred: boolean;
 	/** Epoch-ms when the workspace was first created. */
 	readonly createdAt: number;
 	/** Epoch-ms of the most recent conversation activity in this workspace. */