feat: Enhance preset name prompt with live status indication for overwriting or creating presets

src/search_filter_ui.py

@@ -542,7 +542,9 @@ class SearchFilterWidget:
     def _ask_preset_name(self, initial: str = "") -> str | None:
         """Prompt for a preset name using a themed ttk modal dialog.
 
-        Returns the entered name (stripped) or None if cancelled.
+        Shows a lightweight hint if the name already exists (will overwrite)
+        or is new (will create). Returns the entered name (stripped) or None
+        if cancelled.
         """
         result: dict[str, str | None] = {"value": None}
 
@@ -557,7 +559,22 @@ class SearchFilterWidget:
         ttk.Label(frame, text="Preset name:").pack(anchor="w")
         name_var = tk.StringVar(value=initial)
         entry = ttk.Entry(frame, textvariable=name_var, width=32)
-        entry.pack(fill="x", pady=(4, 10))
+        entry.pack(fill="x", pady=(4, 6))
+
+        # Live status about overwrite vs create
+        status_var = tk.StringVar(value="")
+        status_label = ttk.Label(frame, textvariable=status_var)
+        status_label.pack(anchor="w", pady=(0, 10))
+
+        def _update_status(*_args: object) -> None:
+            presets = get_pref("filter_presets", {}) or {}
+            value = (name_var.get() or "").strip()
+            if not value:
+                status_var.set("")
+            elif value in presets:
+                status_var.set("Existing preset found: will overwrite")
+            else:
+                status_var.set("New preset: will create")
 
         buttons = ttk.Frame(frame)
         buttons.pack(anchor="e")
@@ -594,6 +611,9 @@ class SearchFilterWidget:
         y = py + (ph // 2) - (wh // 2)
         top.geometry(f"+{x}+{y}")
 
+        # Initialize live status and focus
+        _update_status()
+        name_var.trace_add("write", _update_status)  # update as user types
         entry.focus_set()
         top.wait_window()
         return result["value"]