feat(web): add Dream Output Viewer

Dreams are currently a black box — to benchmark Tier L models on dreamer
induction quality we need to see what each model produced. This adds a
workspace-scoped /dreams route that surfaces every dream run as a
group of conclusions split into explicit / deductive / inductive
columns, with click-to-expand premise trees.

What's here:

- `lib/dreams.ts`: pure helpers. `clusterConclusionsIntoDreams` groups a
  raw conclusions list into per-pair bursts using a configurable time
  window (default 60s). `expandPremiseTree` walks `reasoning_tree` first
  and falls back to a flat `premises` ID list, with cycle detection and
  a depth cap. Defines an `ExtendedConclusion` type that augments the
  generated schema with `conclusion_type`, `premises`, and
  `reasoning_tree` — Honcho's migration f1a2b3c4d5e6 added those
  columns but `schema.d.ts` doesn't expose them yet, so the UI degrades
  gracefully (unknown types fall into "explicit").

- `api/queries.ts`: new `useDreams` hook that paginates the conclusions
  list endpoint up to a configurable cap (default 400) and hands the
  raw list to the UI for clustering. New `dreams` query key.

- `components/dreams/`:
  - `DreamList.tsx` — route entry. Shows recent dreams as rows with
    timestamp, observer→observed pair, and per-type counts. Selecting
    a row expands an inline detail panel above the list.
  - `DreamDetail.tsx` — three-column view (explicit / deductive /
    inductive). Each inductive conclusion has a "Show premises" button
    that expands the reasoning chain.
  - `PremiseTree.tsx` — recursive premise renderer with type badges,
    cycle indicator, and graceful handling of premises that fall
    outside the loaded page.

- Routing: `routes/workspaces_.$workspaceId_.dreams.tsx` registers the
  page; routeTree.gen.ts regenerated.

- Sidebar: new "Dreams" entry between Conclusions and Webhooks
  (MoonStar icon to distinguish from the dark-mode Moon).

- Breadcrumb: "dreams" added to SECTION_LABELS so the trail resolves.

Tests (vitest, 14 new):
- clustering: empty input; same-pair burst within window; gap exceeds
  threshold → split; different pairs don't merge even with overlapping
  timestamps; custom gap window; newest-first ordering; counts default
  unknown types to explicit.
- premise tree: empty children for no premises; flat list → direct
  children; multi-level reasoning_tree recursion; missing premise
  flagged (not in loaded page); cycle detection halts recursion;
  maxDepth cap; reasoning_tree preferred over flat premises.

Verified manually in the preview: route mounts, sidebar/breadcrumb
resolve, error path renders cleanly, typecheck + lint + dream tests
all clean. The unrelated `app.test.tsx` failure is pre-existing on
main.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/web/src/api/queries.ts

@@ -690,6 +690,50 @@ export function useDeleteConclusion(workspaceId: string) {
 	});
 }
 
+// ─── Dreams ───────────────────────────────────────────────────────────────────
+//
+// Dreams are synthetic groupings of conclusions: bursts produced by a single
+// dream run for one (observer, observed) pair. We fetch a generous batch of
+// conclusions and let the UI cluster them via `clusterConclusionsIntoDreams`.
+
+const DREAM_FETCH_PAGE_SIZE = 100;
+const DREAM_MAX_PAGES = 4;
+
+export function useDreams(
+	workspaceId: string,
+	filters: Record<string, unknown> = {},
+	limit = DREAM_FETCH_PAGE_SIZE * DREAM_MAX_PAGES,
+) {
+	return useQuery({
+		queryKey: QK.dreams(workspaceId, filters, limit),
+		queryFn: async () => {
+			const collected: unknown[] = [];
+			const pageSize = Math.min(DREAM_FETCH_PAGE_SIZE, limit);
+			let page = 1;
+			while (collected.length < limit) {
+				const { data, error } = await client.current.POST(
+					"/v3/workspaces/{workspace_id}/conclusions/list",
+					{
+						params: {
+							path: { workspace_id: workspaceId },
+							query: { page, page_size: pageSize, reverse: false },
+						},
+						body: filters,
+					},
+				);
+				if (error) err(error);
+				const items = (data as { items?: unknown[] } | undefined)?.items ?? [];
+				const totalPages = (data as { pages?: number } | undefined)?.pages ?? 1;
+				collected.push(...items);
+				if (items.length === 0 || page >= totalPages || page >= DREAM_MAX_PAGES) break;
+				page++;
+			}
+			return collected.slice(0, limit);
+		},
+		enabled: Boolean(workspaceId),
+	});
+}
+
 // ─── Webhooks ─────────────────────────────────────────────────────────────────
 
 export function useWebhooks(workspaceId: string) {