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/locales/en/home.json

@@ -15,6 +15,7 @@
   "checkup": "Checkup",
   "translations": "Translations",
   "influences": "Influences",
+  "movementLinks": "Movement links",
   "tours": "Tours",
   "toursEditor": "Tour editor",
   "users": "Users",

client/src/locales/en/influences.json

@@ -1,6 +1,7 @@
 {
   "title": "Influence links",
   "back": "← Back to gallery",
+  "openMovementLinks": "Movement links →",
   "tabList": "List",
   "tabImport": "Import",
   "tabGraph": "Graph",

client/src/locales/en/movementLinks.json

@@ -0,0 +1,52 @@
+{
+  "title": "Movement links",
+  "back": "← Back to gallery",
+  "intro": "Predecessor → successor edges used by the timeline flow and Tree of Art. Every link needs a proof URL (museum essay, literature, or other web reference).",
+  "introCurator": "Curators can vote to delete a link and must give a reason. Only an admin can perform the final delete after reviewing votes.",
+  "introAdmin": "As admin you can delete links directly. Review curator delete votes (reasons) before confirming.",
+  "loadFailed": "Failed to load movement links",
+  "saveFailed": "Failed to save movement link",
+  "deleteFailed": "Failed to delete movement link",
+  "voteFailed": "Failed to cast delete vote",
+  "withdrawFailed": "Failed to withdraw vote",
+  "searchPlaceholder": "Search source, target, proof…",
+  "refresh": "Refresh",
+  "loading": "Loading…",
+  "loadingVotes": "Loading votes…",
+  "votesLoadFailed": "Could not load votes.",
+  "total": "{{count}} links",
+  "noLinks": "No movement links yet.",
+  "addLink": "Add link",
+  "cancelAdd": "Cancel",
+  "addTitle": "New movement link",
+  "source": "Source (from)",
+  "target": "Target (to)",
+  "pickMovement": "Select movement…",
+  "proofUrl": "Proof URL",
+  "proofLabel": "Proof label",
+  "proofLabelPlaceholder": "e.g. Met — Cubism",
+  "linkYear": "Link date ≈",
+  "linkYearPlaceholder": "e.g. 1907",
+  "notes": "Notes",
+  "saveLink": "Save link",
+  "saving": "Saving…",
+  "addRequiresMovements": "Pick both source and target movements",
+  "proofRequired": "Proof URL is required",
+  "voteTitle": "Vote to delete",
+  "voteReason": "Reason",
+  "voteReasonPlaceholder": "Explain why this link should be removed (min. 10 characters)…",
+  "voteReasonRequired": "Reason must be at least 10 characters",
+  "submitVote": "Submit vote",
+  "cancelVote": "Cancel",
+  "voteDelete": "Vote to delete",
+  "withdrawVote": "Withdraw vote",
+  "voteCount": "{{count}} vote(s)",
+  "colSource": "Source",
+  "colTarget": "Target",
+  "colYear": "Link date ≈",
+  "colProof": "Reference / proof",
+  "colVotes": "Delete votes",
+  "colActions": "Actions",
+  "delete": "Delete",
+  "confirmDelete": "Delete this movement link? Curator vote reasons will be recorded in the audit log."
+}

client/src/locales/en/users.json

@@ -25,7 +25,7 @@
   "perm_checkup": "Checkup",
   "perm_curator_notes": "Curator notes",
   "perm_translations": "Translations",
-  "perm_influences": "Influences",
+  "perm_influences": "Influences & movement links",
   "perm_tours": "Tours",
   "perm_users": "Users",
   "adminAllPerms": "Admins have all permissions automatically.",