refactor: replace settings buttons with switches and simplify provider sheet

Swap daemon management and keep-running-after-quit buttons for Switch
toggles. Remove the restart/start daemon control. Simplify the provider
diagnostic sheet to reuse shared settings styles and SettingsSection.
Drop the unused "sm" size variant from the Switch component. Remove
trailing periods from hint text for consistency.

packages/app/src/desktop/components/integrations-section.tsx

@@ -133,9 +133,7 @@ export function IntegrationsSection() {
               <Terminal size={theme.iconSize.md} color={theme.colors.foreground} />
               <Text style={settingsStyles.rowTitle}>Command line</Text>
             </View>
-            <Text style={settingsStyles.rowHint}>
-              Control and script agents from your terminal.
-            </Text>
+            <Text style={settingsStyles.rowHint}>Control and script agents from your terminal</Text>
           </View>
           {cliStatus?.installed ? (
             <View style={styles.installedLabel}>
@@ -160,7 +158,7 @@ export function IntegrationsSection() {
               <Text style={settingsStyles.rowTitle}>Orchestration skills</Text>
             </View>
             <Text style={settingsStyles.rowHint}>
-              Teach your agents to orchestrate through the CLI.
+              Teach your agents to orchestrate through the CLI
             </Text>
           </View>
           {skillsStatus?.installed ? (