Enable cross-search persistent selection, explicit disk deletion confirmations, and 1-click duplicate copy deletion

server.py

@@ -523,14 +523,33 @@ def build_dedupe_index():
             S.dedupe_status = "idle"
 
 def find_duplicate_groups():
-    """Groups of exact perceptual-hash matches — visually identical / re-saved copies."""
+    """Groups of exact perceptual-hash matches and size/filename matches."""
     records = {r["path"]: r for r in load_search_index()}
     cache = load_phash_cache()
-    by_hash = {}
+    groups_by_key = {}
+    
+    # 1. Group by pHash if available
     for path, h in cache.items():
-        if path in records:
-            by_hash.setdefault(h, []).append(records[path])
-    groups = [g for g in by_hash.values() if len(g) > 1]
+        if path in records and os.path.exists(path):
+            groups_by_key.setdefault(f"phash:{h}", []).append(records[path])
+            
+    # 2. Also group by (file size, filename) for non-hashed or exact size matches
+    by_size_name = {}
+    for path, r in records.items():
+        if path not in cache and os.path.exists(path):
+            try:
+                sz = os.path.getsize(path)
+                name = os.path.basename(path).lower()
+                key = f"size:{sz}_{name}"
+                by_size_name.setdefault(key, []).append(r)
+            except Exception:
+                pass
+                
+    for key, g in by_size_name.items():
+        if len(g) > 1:
+            groups_by_key[key] = g
+
+    groups = [g for g in groups_by_key.values() if len(g) > 1]
     groups.sort(key=len, reverse=True)
     return groups