Replace Install/Remove crontab buttons with Active toggle switch

Switch checks current crontab status on mount. Toggling ON runs
schedule install, toggling OFF runs schedule remove. Show crontab
button remains for inspection.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tui/gniza.tcss

@@ -256,6 +256,17 @@ Switch {
     margin: 0 1;
 }
 
+#sched-active-row {
+    height: auto;
+    align: left middle;
+    margin: 1 0;
+}
+
+#sched-active-label {
+    width: auto;
+    margin: 0 1 0 0;
+}
+
 .section-label {
     text-style: bold;
     color: #00cc00;

tui/screens/schedule.py

@@ -1,7 +1,7 @@
 import re
 from textual.app import ComposeResult
 from textual.screen import Screen
-from textual.widgets import Header, Footer, Static, Button, DataTable, Input, Select, SelectionList
+from textual.widgets import Header, Footer, Static, Button, DataTable, Input, Select, SelectionList, Switch
 from textual.containers import Vertical, Horizontal
 from textual import work
 
@@ -40,12 +40,13 @@ class ScheduleScreen(Screen):
         with Vertical(id="schedule-screen"):
             yield Static("Schedules", id="screen-title")
             yield DataTable(id="sched-table")
+            with Horizontal(id="sched-active-row"):
+                yield Static("Active (crontab):", id="sched-active-label")
+                yield Switch(id="sched-active")
             with Horizontal(id="sched-buttons"):
                 yield Button("Add", variant="primary", id="btn-add")
                 yield Button("Edit", id="btn-edit")
                 yield Button("Delete", variant="error", id="btn-delete")
-                yield Button("Install to crontab", id="btn-install")
-                yield Button("Remove from crontab", id="btn-remove")
                 yield Button("Show crontab", id="btn-show")
                 yield Button("Back", id="btn-back")
             yield Static("", id="sched-divider")
@@ -110,6 +111,20 @@ class ScheduleScreen(Screen):
     def on_mount(self) -> None:
         self._refresh_table()
         self._update_type_visibility()
+        self._check_crontab_status()
+
+    @work
+    async def _check_crontab_status(self) -> None:
+        rc, stdout, stderr = await run_cli("schedule", "show")
+        has_entries = bool(stdout.strip()) and "no gniza" not in stdout.lower()
+        self.query_one("#sched-active", Switch).value = has_entries
+
+    def on_switch_changed(self, event: Switch.Changed) -> None:
+        if event.switch.id == "sched-active":
+            if event.value:
+                self._install_schedules()
+            else:
+                self._remove_schedules()
 
     def on_select_changed(self, event: Select.Changed) -> None:
         if event.select.id == "sched-type":
@@ -167,10 +182,6 @@ class ScheduleScreen(Screen):
                 )
             else:
                 self.notify("Select a schedule first", severity="warning")
-        elif event.button.id == "btn-install":
-            self._install_schedules()
-        elif event.button.id == "btn-remove":
-            self._remove_schedules()
         elif event.button.id == "btn-show":
             self._show_crontab()
 
@@ -275,23 +286,19 @@ class ScheduleScreen(Screen):
 
     @work
     async def _install_schedules(self) -> None:
-        log_screen = OperationLog("Install Schedules")
-        self.app.push_screen(log_screen)
         rc, stdout, stderr = await run_cli("schedule", "install")
-        if stdout:
+        if rc == 0:
-            log_screen.write(stdout)
+            self.notify("Schedules installed to crontab")
-        if stderr:
+        else:
-            log_screen.write(stderr)
+            self.notify(f"Failed to install: {stderr or stdout}", severity="error")
 
     @work
     async def _remove_schedules(self) -> None:
-        log_screen = OperationLog("Remove Schedules")
-        self.app.push_screen(log_screen)
         rc, stdout, stderr = await run_cli("schedule", "remove")
-        if stdout:
+        if rc == 0:
-            log_screen.write(stdout)
+            self.notify("Schedules removed from crontab")
-        if stderr:
+        else:
-            log_screen.write(stderr)
+            self.notify(f"Failed to remove: {stderr or stdout}", severity="error")
 
     @work
     async def _show_crontab(self) -> None: