diff --git a/index.html b/index.html
index 458ff26..38763d8 100644
--- a/index.html
+++ b/index.html
@@ -1549,15 +1549,15 @@ let lastClickedIndex = null;
 
 $("btnSelectMode").onclick = ()=>{
   selectMode = !selectMode;
-  $("btnSelectMode").textContent = selectMode ? "☑ Exit Select" : "☐ Select";
-  if(!selectMode){ selectedPaths.clear(); lastClickedIndex = null; }
+  $("btnSelectMode").textContent = selectMode ? "☑ Exit Select Mode" : (selectedPaths.size ? `☑ Select (${selectedPaths.size})` : "☐ Select");
   renderSearchResults();
   updateBulkBar();
 };
 
 function updateBulkBar(){
-  $("bulkBar").style.display = selectMode ? "flex" : "none";
-  $("bulkCount").textContent = selectedPaths.size + " selected";
+  const hasSelected = selectedPaths.size > 0;
+  $("bulkBar").style.display = (selectMode || hasSelected) ? "flex" : "none";
+  $("bulkCount").textContent = selectedPaths.size + " selected (across searches)";
   $("btnSelectAllMatching").textContent = "Select all " + (searchTotal || 0) + " matching";
 }
 
@@ -1796,9 +1796,20 @@ async function loadDupeGroups(){
       t.className = "dupe-thumb";
       t.innerHTML = `<img src="/api/thumbnail?path=${encodeURIComponent(rec.path)}">
                       <div class="name" title="${rec.path}">${escapeHtml(rec.name)}</div>
-                      <button>Reveal in Finder</button>`;
+                      <button class="btn-reveal" style="width:100%;margin-top:4px">Reveal in Finder</button>
+                      <button class="btn-del-dupe btn-danger" style="width:100%;margin-top:4px">🗑 Delete copy</button>`;
       t.querySelector("img").onclick = ()=>openQuickView(rec);
-      t.querySelector("button").onclick = ()=>api("/api/reveal", {path: rec.path});
+      t.querySelector(".btn-reveal").onclick = ()=>api("/api/reveal", {path: rec.path});
+      t.querySelector(".btn-del-dupe").onclick = async ()=>{
+        if(!confirm(`PERMANENT DISK DELETION\n\nAre you sure you want to permanently delete this duplicate file from disk?\n\nFile: ${rec.path}\n\nThis cannot be undone.`)) return;
+        const resp = await api("/api/delete_photo", {path: rec.path});
+        if(resp.ok){
+          showToast("Deleted duplicate copy: " + os_basename(rec.path), "ok");
+          loadDupeGroups();
+        } else {
+          showToast(resp.error || "Failed to delete duplicate file", "error");
+        }
+      };
       rowEl.appendChild(t);
     });
     grp.appendChild(rowEl);
diff --git a/server.py b/server.py
index b4b9d6a..d06cc07 100644
--- a/server.py
+++ b/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