feat: journal dashboard widgets, agent polish, and edit-mode live previews

Journal dashboard widgets and quick-add; rich-text quick-add dialogs.

Dashboard draft sync for live edit previews; assistant bubble + API tools.

Journal UX: stress slider, mood grid, query cap fix.

src/app/api/v1/share-links/[id]/route.ts

@@ -0,0 +1,12 @@
+import { z } from "zod";
+import { apiJson, withApiHandler } from "@/lib/api-handler";
+import { revokeShareLinkForScope } from "@/modules/_core/share-api";
+
+export async function DELETE(request: Request, { params }: { params: Promise<{ id: string }> }) {
+  const { id } = await params;
+  return withApiHandler(request, async (scope) => {
+    z.string().uuid().parse(id);
+    await revokeShareLinkForScope(scope, id);
+    return apiJson({ ok: true });
+  });
+}