Add curator Movement links config with proof URLs and admin-gated delete votes.

Persist lineage in PostgreSQL, seed documented edges, and keep timeline/tree consumers API-backed with a static fallback.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/api/client.ts

@@ -773,6 +773,81 @@ export const api = {
     );
   },
 
+  listMovementLinks: (params: { q?: string; limit?: number; offset?: number } = {}) => {
+    const qs = new URLSearchParams();
+    if (params.q) qs.set('q', params.q);
+    if (params.limit) qs.set('limit', String(params.limit));
+    if (params.offset) qs.set('offset', String(params.offset));
+    const q = qs.toString();
+    return fetchJson<{ items: MovementLineageLinkItem[]; total: number }>(
+      `${API}/movement-links${q ? `?${q}` : ''}`,
+    );
+  },
+
+  createMovementLink: (payload: {
+    sourceMovementId: number;
+    targetMovementId: number;
+    proofUrl: string;
+    proofLabel?: string;
+    linkYearApprox?: number | null;
+    notes?: string;
+  }) =>
+    fetch(`${API}/movement-links`, {
+      ...fetchCredentials,
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(payload),
+    }).then(async (res) => {
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({}));
+        throw new Error(body.error || `Create failed: ${res.status}`);
+      }
+      return res.json() as Promise<{ item: MovementLineageLinkItem }>;
+    }),
+
+  listMovementLinkDeleteVotes: (id: number) =>
+    fetchJson<{ linkId: number; votes: MovementLineageDeleteVote[] }>(
+      `${API}/movement-links/${id}/delete-votes`,
+    ),
+
+  voteDeleteMovementLink: (id: number, reason: string) =>
+    fetch(`${API}/movement-links/${id}/delete-votes`, {
+      ...fetchCredentials,
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ reason }),
+    }).then(async (res) => {
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({}));
+        throw new Error(body.error || `Vote failed: ${res.status}`);
+      }
+      return res.json() as Promise<{ vote: MovementLineageDeleteVote }>;
+    }),
+
+  withdrawDeleteMovementLinkVote: (id: number) =>
+    fetch(`${API}/movement-links/${id}/delete-votes/me`, {
+      ...fetchCredentials,
+      method: 'DELETE',
+    }).then(async (res) => {
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({}));
+        throw new Error(body.error || `Withdraw failed: ${res.status}`);
+      }
+      return res.json() as Promise<{ ok: boolean; id: number; linkId: number }>;
+    }),
+
+  deleteMovementLink: (id: number) =>
+    fetch(`${API}/movement-links/${id}`, {
+      ...fetchCredentials,
+      method: 'DELETE',
+    }).then(async (res) => {
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({}));
+        throw new Error(body.error || `Delete failed: ${res.status}`);
+      }
+      return res.json() as Promise<{ ok: boolean; id: number }>;
+    }),
+
   getInfluenceGraph: (params: { artistId?: number; paintingId?: number }) => {
     const qs = new URLSearchParams();
     if (params.artistId) qs.set('artistId', String(params.artistId));
@@ -1032,6 +1107,33 @@ export interface InfluenceEdgeItem {
   updatedAt: string | null;
 }
 
+export interface MovementLineageLinkItem {
+  id: number;
+  source_movement_id: number;
+  target_movement_id: number;
+  link_year_approx: number | null;
+  proof_url: string;
+  proof_label: string | null;
+  notes: string | null;
+  created_at: string;
+  updated_at: string;
+  source_name: string;
+  source_start_year: number;
+  target_name: string;
+  target_start_year: number;
+  delete_vote_count?: number;
+  viewer_has_delete_vote?: boolean;
+}
+
+export interface MovementLineageDeleteVote {
+  id: number;
+  link_id: number;
+  user_id: number;
+  reason: string;
+  created_at: string;
+  username?: string;
+}
+
 export interface InfluenceGraph {
   focus: { artistId: number; paintingId: number | null; label: string };
   nodes: Array<{ id: string; type: string; label: string; focus?: boolean; artistId?: number; paintingId?: number; movementId?: number }>;