feat: Restart Claude Desktop button after save (#9)

After a successful save, shows a 'Restart Claude Desktop' button next to
the status line. Only shown when the saved profile targets Claude Desktop
(core.profile_targets_claude_desktop) -- never for Claude Code, which has
no GUI process to bounce. Clicking it calls core.restart_claude_desktop()
and reports success/failure. The button hides again on further edits or
when switching/reloading profiles.

bcc.py

@@ -1135,9 +1135,19 @@ class MainWindow(QMainWindow):
 
         root.addLayout(self._build_actionbar())
 
+        status_row = QHBoxLayout()
+        status_row.setContentsMargins(0, 0, 0, 0)
         self.status = QLabel("Ready.")
         self.status.setObjectName("statusbar")
-        root.addWidget(self.status)
+        status_row.addWidget(self.status, 1)
+        self.restart_btn = QPushButton("Restart Claude Desktop")
+        self.restart_btn.setToolTip(
+            "Quit and relaunch Claude Desktop so the saved config takes effect"
+        )
+        self.restart_btn.clicked.connect(self._restart_claude_desktop)
+        self.restart_btn.hide()
+        status_row.addWidget(self.restart_btn)
+        root.addLayout(status_row)
 
         self._restore_layout()
         self.reload_profiles()
@@ -1384,6 +1394,7 @@ class MainWindow(QMainWindow):
         self.current_profile = profile
         self.servers = core.extract_servers(self.full_config)
         self.dirty = False
+        self.restart_btn.hide()
         self._undo_stack.clear()
         self.undo_btn.setEnabled(False)
         self._refresh_tables(select_index=0 if self.servers else -1)
@@ -1753,6 +1764,7 @@ class MainWindow(QMainWindow):
                     f"Merged & saved {self.current_profile.path}{bnote}"
                     f"  ·  Restart {self.current_profile.label} to apply."
                 )
+                self._offer_restart_button()
                 return
             # else OVERWRITE: fall through to normal write
 
@@ -1770,6 +1782,29 @@ class MainWindow(QMainWindow):
         self.status.setText(
             f"Saved {self.current_profile.path}{bnote}  ·  Restart {self.current_profile.label} to apply."
         )
+        self._offer_restart_button()
+
+    # --- restart Claude Desktop (issue #9) -------------------------------- #
+    def _offer_restart_button(self):
+        """Show the 'Restart Claude Desktop' button after a successful save,
+        but only when the just-saved profile is Claude Desktop -- restarting
+        makes no sense for Claude Code, which has no GUI process to bounce."""
+        if self.current_profile and core.profile_targets_claude_desktop(self.current_profile):
+            self.restart_btn.show()
+        else:
+            self.restart_btn.hide()
+
+    def _restart_claude_desktop(self):
+        self.restart_btn.setEnabled(False)
+        try:
+            result = core.restart_claude_desktop()
+        finally:
+            self.restart_btn.setEnabled(True)
+        self.restart_btn.hide()
+        if result.success:
+            self.status.setText(f"{self.status.text()}  ·  {result.detail}")
+        else:
+            QMessageBox.warning(self, "Restart failed", result.detail)
 
     def _restore_from_backup(self):
         if not self.current_profile:
@@ -1798,6 +1833,7 @@ class MainWindow(QMainWindow):
     # --- dirty / status -------------------------------------------------- #
     def _mark_dirty(self):
         self.dirty = True
+        self.restart_btn.hide()
         self._validate()
         self._update_status(saved=False)