feat(ui): add action buttons to Docker, Git, systemd, and Caddy modules

- Docker table: Restart and Stop buttons per container row (docker_compose_restart / docker_compose_stop)
- Git repos list: Fetch and Pull buttons per repo; Pull disabled when working tree is dirty
- systemd units list: Restart button per unit (systemctl_restart)
- Caddy: Edit link on /caddy page, new /caddy/edit page with textarea + 3-step Validate → Save+Reload flow
- All buttons open ConfirmDialog with exact agent-call preview, then stream output via StreamingTerminal
- Add docker_compose_stop to ops-agent/commands.yml.example

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

app/systemd/_components/systemd-units-list.tsx

@@ -3,6 +3,9 @@
 import { useCallback, useEffect, useState } from 'react'
 import Link from 'next/link'
 import { parseSystemctlStatus, type UnitStatus, type ActiveState } from '@/lib/parse-systemd'
+import { useFlowRun } from '@/hooks/useFlowRun'
+import ConfirmDialog from '@/components/ConfirmDialog'
+import StreamingTerminal from '@/components/StreamingTerminal'
 
 interface UnitEntry {
   unit: string
@@ -84,6 +87,13 @@ function StatusBadge({ status }: { status: UnitStatus }) {
   )
 }
 
+type ActionDef = {
+  commandKey: string
+  args: string[]
+  preview: string
+  title: string
+}
+
 type Props = {
   initialUnits: UnitEntry[]
 }
@@ -92,6 +102,8 @@ export default function SystemdUnitsList({ initialUnits }: Props) {
   const [units, setUnits] = useState<UnitEntry[]>(initialUnits)
   const [refreshing, setRefreshing] = useState(false)
   const [lastUpdated, setLastUpdated] = useState<Date>(new Date())
+  const [pendingAction, setPendingAction] = useState<ActionDef | null>(null)
+  const flowRun = useFlowRun()
 
   const refresh = useCallback(async () => {
     setRefreshing(true)
@@ -118,6 +130,12 @@ export default function SystemdUnitsList({ initialUnits }: Props) {
     return () => clearInterval(id)
   }, [refresh])
 
+  const handleConfirm = useCallback(() => {
+    if (!pendingAction) return
+    flowRun.start(pendingAction.commandKey, pendingAction.args)
+    setPendingAction(null)
+  }, [pendingAction, flowRun.start])
+
   return (
     <div className="space-y-4">
       <div className="flex items-center justify-between">
@@ -142,6 +160,7 @@ export default function SystemdUnitsList({ initialUnits }: Props) {
               <th className="px-4 py-3 text-left font-medium text-muted-foreground">Description</th>
               <th className="px-4 py-3 text-left font-medium text-muted-foreground">Status</th>
               <th className="px-4 py-3 text-left font-medium text-muted-foreground">Uptime</th>
+              <th className="px-4 py-3 text-left font-medium text-muted-foreground">Actions</th>
             </tr>
           </thead>
           <tbody>
@@ -173,11 +192,52 @@ export default function SystemdUnitsList({ initialUnits }: Props) {
                 <td className="px-4 py-3 text-xs text-muted-foreground">
                   {entry.status?.uptime || '—'}
                 </td>
+                <td className="px-4 py-3">
+                  <button
+                    onClick={() =>
+                      setPendingAction({
+                        commandKey: 'systemctl_restart',
+                        args: [entry.unit],
+                        preview: `sudo /usr/bin/systemctl restart ${entry.unit}`,
+                        title: `Restart ${entry.unit}`,
+                      })
+                    }
+                    disabled={flowRun.status === 'running'}
+                    className="rounded-md border border-border px-2 py-1 text-xs hover:bg-muted/50 disabled:opacity-50 transition-colors"
+                  >
+                    Restart
+                  </button>
+                </td>
               </tr>
             ))}
           </tbody>
         </table>
       </div>
+
+      {flowRun.status !== 'idle' && (
+        <div className="space-y-2">
+          <div className="flex items-center justify-between">
+            <span className="text-sm font-medium text-foreground">Output</span>
+            {flowRun.status !== 'running' && (
+              <button
+                onClick={flowRun.reset}
+                className="text-xs text-muted-foreground hover:text-foreground transition-colors"
+              >
+                Close
+              </button>
+            )}
+          </div>
+          <StreamingTerminal lines={flowRun.lines} status={flowRun.status} error={flowRun.error} />
+        </div>
+      )}
+
+      <ConfirmDialog
+        open={pendingAction !== null}
+        title={pendingAction?.title ?? ''}
+        commandPreview={pendingAction?.preview ?? ''}
+        onConfirm={handleConfirm}
+        onCancel={() => setPendingAction(null)}
+      />
     </div>
   )
 }