Fix right-click context menus firing their first item on Linux

Bound to <Button-3> with finally: menu.grab_release(), the menu lost its grab
immediately and the trailing <ButtonRelease-3> activated the entry under the
cursor — right-clicking a history row jumped straight into the edit dialog and
deleting was impossible.

- RIGHT_CLICK constant: <ButtonRelease-3> (<ButtonRelease-2> on macOS)
- history + queue menus built once on self, not per click
- drop the premature grab_release()

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app.py

@@ -54,6 +54,10 @@ UI_FONT_SIZE = 11
 #: DRK-Rot – für Akzente in der Oberfläche und die Kartenpunkte.
 DRK_RED = "#CC0000"
 
+#: Rechtsklick-Event. ``<ButtonRelease-…>`` statt ``<Button-…>``: sonst landet
+#: unter X11 das Loslassen der Maustaste direkt im ersten Menüeintrag.
+RIGHT_CLICK = "<ButtonRelease-2>" if sys.platform == "darwin" else "<ButtonRelease-3>"
+
 #: Regionen, die bei der Geokodierung bevorzugt durchsucht werden (Reihenfolge zählt).
 GEOCODE_REGIONS = ["Baden-Württemberg", "Hessen"]
 
@@ -1050,8 +1054,16 @@ class App(ttk.Window):
         self.tree.pack(side=LEFT, fill=BOTH, expand=True)
         sb.pack(side=RIGHT, fill=Y)
 
+        self._queue_menu = tk.Menu(self, tearoff=0)
+        self._queue_menu.add_command(
+            label="Entfernen", command=self._delete_selected_queue_rows
+        )
+        self._queue_menu.add_command(
+            label="Koordinaten erneut suchen", command=self._retry_selected_geocode
+        )
+
         self.tree.bind("<ButtonRelease-1>", self._on_tree_click)
-        self.tree.bind("<Button-3>", self._on_queue_right_click)
+        self.tree.bind(RIGHT_CLICK, self._on_queue_right_click)
         self.tree.bind("<Delete>", lambda _e: self._delete_selected_queue_rows())
 
         # Aktionsleiste
@@ -1113,8 +1125,16 @@ class App(ttk.Window):
 
         self.hist_tree.tag_configure("missing", foreground=DRK_RED)
 
+        self._hist_menu = tk.Menu(self, tearoff=0)
+        self._hist_menu.add_command(label="Bearbeiten…", command=self._on_hist_edit)
+        self._hist_menu.add_command(
+            label="Koordinaten suchen", command=self._on_hist_geocode
+        )
+        self._hist_menu.add_separator()
+        self._hist_menu.add_command(label="Löschen", command=self._on_hist_delete)
+
         self.hist_tree.bind("<Double-1>", self._on_hist_double_click)
-        self.hist_tree.bind("<Button-3>", self._on_hist_right_click)
+        self.hist_tree.bind(RIGHT_CLICK, self._on_hist_right_click)
 
         self._sort_col = "date"
         self._sort_asc = False  # neueste zuerst
@@ -1212,15 +1232,8 @@ class App(ttk.Window):
         if not iid:
             return
         self.hist_tree.selection_set(iid)
-        menu = tk.Menu(self, tearoff=0)
-        menu.add_command(label="Bearbeiten", command=self._on_hist_edit)
-        menu.add_command(label="Koordinaten suchen", command=self._on_hist_geocode)
-        menu.add_separator()
-        menu.add_command(label="Löschen", command=self._on_hist_delete)
-        try:
-            menu.tk_popup(event.x_root, event.y_root)
-        finally:
-            menu.grab_release()
+        self.hist_tree.focus(iid)
+        self._hist_menu.tk_popup(event.x_root, event.y_root)
 
     def _on_hist_geocode(self) -> None:
         sel = self.hist_tree.selection()
@@ -1406,14 +1419,13 @@ class App(ttk.Window):
         row_id = self.tree.identify_row(event.y)
         if not row_id:
             return
-        menu = tk.Menu(self, tearoff=0)
-        menu.add_command(label="Löschen", command=lambda: self._delete_queue_row(row_id))
-        menu.add_command(label="Koordinaten erneut suchen",
-                         command=lambda: self._retry_geocode(row_id))
-        try:
-            menu.tk_popup(event.x_root, event.y_root)
-        finally:
-            menu.grab_release()
+        if row_id not in self.tree.selection():
+            self.tree.selection_set(row_id)
+        self._queue_menu.tk_popup(event.x_root, event.y_root)
+
+    def _retry_selected_geocode(self) -> None:
+        for row_id in self.tree.selection():
+            self._retry_geocode(row_id)
 
     def _delete_queue_row(self, row_id: str) -> None:
         self._queue = [r for r in self._queue if r["_id"] != row_id]

docs/changelog.md

@@ -2,6 +2,15 @@
 
 Notable changes to the app. Newest first.
 
+## 2026-09-07 — fix: right-click context menu instantly triggered its first item
+
+On Linux the Tab 2 (and queue) right-click menu flashed and immediately ran
+"Bearbeiten" / "Löschen", so entries couldn't be deleted. Cause: the menu was
+bound to `<Button-3>` (press) and `finally: menu.grab_release()` dropped the
+grab, so the following `<ButtonRelease-3>` selected the item under the cursor.
+Fix: bind `<ButtonRelease-3>` (`<ButtonRelease-2>` on macOS), build each menu
+once, and drop the premature `grab_release()`.
+
 ## 2026-09-07 — map tiles → Esri (OSM 403s local files)
 
 The switch to `tiles="OpenStreetMap"` worked on the dev machine but the target

docs/dev-notes.md

@@ -57,6 +57,20 @@ Lesson: a tile source that works from `curl` or an `http://` page can still fail
 from `file://`. Test the map by **opening the generated `karte.html` directly**,
 not just by checking the URL in the HTML.
 
+## Tk popup menus: bind `<ButtonRelease-3>`, not `<Button-3>` (2026-09-07)
+
+`widget.bind("<Button-3>", …)` + `menu.tk_popup(x, y)` + `finally:
+menu.grab_release()` is the Windows idiom and **misfires on X11**: `tk_popup`
+returns immediately, `grab_release()` drops the menu's grab, and the pending
+`<ButtonRelease-3>` then activates whatever entry is under the cursor (the first
+one). Symptom here: right-click a history row → menu flashes → edit dialog opens.
+
+Rules for this codebase:
+- bind the release event: `RIGHT_CLICK` constant (`<ButtonRelease-3>`, or
+  `<ButtonRelease-2>` on macOS),
+- build each context menu **once** (store on `self`), don't recreate per click,
+- just call `menu.tk_popup(...)` — no `grab_release()`.
+
 ## Nominatim query order matters
 
 `geocode_city` returns the **first** hit, trying PLZ-qualified first, then each

docs/overview.md

@@ -26,7 +26,7 @@ then save the whole batch at once.
    as the background geocoder works through the queue.
    - Select a row and press <kbd>Delete</kbd>, use the **"Auswahl entfernen"**
      button, or click the `✕` cell.
-   - Right-click a row for *Löschen* / *Koordinaten erneut suchen*.
+   - Right-click a row for *Entfernen* / *Koordinaten erneut suchen*.
 3. **Action bar**
    - **Alle speichern** – appends every queued row to `orte.csv`. If any row
      looks like a duplicate (same date + city + PLZ), a **modal** lists them and