Give OpenCode Go a reachable Fetch model list button

The one button lived in the OpenRouter model row, which leaves the
screen whenever another provider is chosen, so the OpenCode fetch path
could never be clicked. The OpenCode row now carries its own button into
the same handler, the row as a whole is what hides, and the fetched list
lands in the box it belongs to without touching the meeting box.

dikte/settings_ui.py

@@ -906,7 +906,14 @@ class SettingsWindow(QDialog):
         self.cleanup_opencode_model = QComboBox()
         self.cleanup_opencode_model.setEditable(True)
         self.cleanup_opencode_model.addItems(OPENCODE_MODELS)
-        orr_form.addRow(t("Model"), self.cleanup_opencode_model)
+        self.cleanup_opencode_model.setToolTip(_typed_model_note("OpenCode Go"))
+        # Its own button, because a widget lives in one row and the OpenRouter
+        # button is hidden along with its box whenever OpenCode Go is chosen.
+        self.refresh_opencode_models = QPushButton(t("Fetch model list"))
+        self.refresh_opencode_models.clicked.connect(self._load_models)
+        self.cleanup_opencode_model_row = self._row(self.cleanup_opencode_model,
+                                                    self.refresh_opencode_models)
+        orr_form.addRow(t("Model"), self.cleanup_opencode_model_row)
 
         self.cleanup_reasoning = QComboBox()
         for label, value in REASONING_LEVELS:
@@ -1996,6 +2003,7 @@ class SettingsWindow(QDialog):
 
     def _load_models(self):
         self.refresh_models.setEnabled(False)
+        self.refresh_opencode_models.setEnabled(False)
         self.models_label.setText(t("Fetching model list…"))
         # Whichever provider is selected for cleanup is the one whose models are
         # fetched, so the list lands in the box of the provider on screen.
@@ -2025,6 +2033,7 @@ class SettingsWindow(QDialog):
 
     def _on_models_loaded(self, models, error, provider):
         self.refresh_models.setEnabled(True)
+        self.refresh_opencode_models.setEnabled(True)
         if error:
             self.models_label.setText(t("Could not fetch the list: {error}", error=error))
             return
@@ -2334,7 +2343,7 @@ class SettingsWindow(QDialog):
                                         provider == "claude")
         self.cleanup_form.setRowVisible(self.cleanup_codex_model,
                                         provider == "codex")
-        self.cleanup_form.setRowVisible(self.cleanup_opencode_model,
+        self.cleanup_form.setRowVisible(self.cleanup_opencode_model_row,
                                         provider == "opencode")
         self.cleanup_form.setRowVisible(self.cleanup_reasoning,
                                         provider != "local")