fix: recall without parameters now returns all memories like list

When the model calls recall without key or category (e.g., 'what memories
do you have?'), it now returns all memories across all categories instead
of an error. This provides better UX since models often use recall instead
of list for memory queries.

frontend/src/lib/tools/templates.ts

@@ -707,7 +707,20 @@ switch (action) {
       return { found: false, key };
     }
 
-    return { error: 'Provide key and/or category' };
+    // No key or category provided - return all memories (like list)
+    const allMemories = {};
+    for (const cat in memory) {
+      allMemories[cat] = Object.entries(memory[cat]).map(([k, data]) => ({
+        key: k,
+        value: data.value,
+        stored: data.stored
+      }));
+    }
+    return {
+      memories: allMemories,
+      totalCategories: Object.keys(memory).length,
+      totalEntries: Object.values(memory).reduce((sum, cat) => sum + Object.keys(cat).length, 0)
+    };
   }
 
   case 'list': {