Reset board preview when switching chats (0.15.15).

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

src/app.js

@@ -3376,11 +3376,12 @@ import { DEFAULT_ASPECT_TABLE, applyAspectTableFromObject as mergeAspectTable }
                 ? S.sessionFromLegacyParams(params)
                 : (params && params.gen ? params : (S && S.emptySession ? S.emptySession() : { gen: {}, board: {} }));
             if (!params || typeof params !== 'object') {
-                if (typeof clearGenResults === 'function') clearGenResults();
+                resetBoardToDefault();
                 if (typeof renderBoard === 'function') renderBoard();
                 setContextMemory(null, { persist: false });
                 return { restored: false };
             }
+            resetBoardToDefault();
             await pushSessionToSwarm(state.chatSession);
             const board = state.chatSession.board || {};
             if (Array.isArray(board.slots) && board.slots.length) {
@@ -3401,8 +3402,6 @@ import { DEFAULT_ASPECT_TABLE, applyAspectTableFromObject as mergeAspectTable }
                 const selected = state.genResults.find((x) => x.id === state.selectedGenResultId);
                 const gen = typeof generateSlot === 'function' ? generateSlot() : null;
                 if (gen && selected?.src) gen.src = selected.src;
-            } else if (typeof clearGenResults === 'function') {
-                clearGenResults();
             }
             if (typeof syncBuildGenButton === 'function') syncBuildGenButton();
             if (typeof syncLiveParamsBar === 'function') syncLiveParamsBar();
@@ -3843,7 +3842,7 @@ import { DEFAULT_ASPECT_TABLE, applyAspectTableFromObject as mergeAspectTable }
         state.lastUserParamIntent = false;
         state.pendingSilentGen = false;
         state.lastPatch = null;
-        clearGenResults();
+        resetBoardToDefault();
         const chat = {
             id: chatUid(),
             title: 'Новый чат',
@@ -5378,11 +5377,27 @@ import { DEFAULT_ASPECT_TABLE, applyAspectTableFromObject as mergeAspectTable }
     function clearGenResults() {
         state.genResults = [];
         state.selectedGenResultId = null;
+        const gen = typeof generateSlot === 'function' ? generateSlot() : null;
+        if (gen) {
+            gen.src = null;
+        }
         if (state.lightboxIndex >= 0) {
             closeGenLightbox();
         }
     }
 
+    /** Empty board — used when switching chats so the previous preview does not leak. */
+    function resetBoardToDefault() {
+        state.slots = [
+            { id: GEN_ID, type: 'generate', label: 'Generate', src: null, attach: false },
+            { id: 'ref1', type: 'ref', label: 'Ref 1', src: null, attach: true },
+        ];
+        state.refSeq = 1;
+        state.selectedSlotId = 'ref1';
+        clearGenResults();
+        syncLastImageAlias();
+    }
+
     function selectGenResult(id, { restore = true, openViewer = false } = {}) {
         const row = (state.genResults || []).find((r) => r.id === id);
         if (!row) {