Add editable Samba global configuration with net conf setparm

Backend:
- Use 'net conf setparm' to update individual parameters
- Accept dictionary of key-value pairs in API

Frontend:
- Add Edit/Cancel/Save buttons to Samba Config tab
- Inline editing of configuration values
- Save changes back to registry

Changes are applied immediately via net conf setparm.

Co-Authored-By: Patrick <patrick@perlbach24.de>

frontend/app/shares/page.tsx

@@ -23,6 +23,9 @@ export default function SharesPage() {
   const [showNfsDialog, setShowNfsDialog] = useState(false)
   const [deleteConfirm, setDeleteConfirm] = useState<{ type: "samba" | "nfs"; name: string } | null>(null)
   const [deleting, setDeleting] = useState(false)
+  const [editMode, setEditMode] = useState(false)
+  const [editedConfig, setEditedConfig] = useState<{ [key: string]: string }>({})
+  const [saving, setSaving] = useState(false)
 
   useEffect(() => {
     const token = localStorage.getItem("access_token")
@@ -90,6 +93,29 @@ export default function SharesPage() {
     setShowNfsDialog(false)
   }
 
+  const handleEditMode = () => {
+    const configMap = sambaConfig.reduce((acc, param) => {
+      acc[param.key] = param.value
+      return acc
+    }, {} as { [key: string]: string })
+    setEditedConfig(configMap)
+    setEditMode(true)
+  }
+
+  const handleSaveConfig = async () => {
+    try {
+      setSaving(true)
+      await api.setSambaConfig(editedConfig)
+      setEditMode(false)
+      await loadShares()
+      setError(null)
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Failed to save configuration")
+    } finally {
+      setSaving(false)
+    }
+  }
+
   return (
     <div className="min-h-screen bg-background">
       <Header />
@@ -272,7 +298,24 @@ export default function SharesPage() {
         {activeTab === "config" && (
           <Card>
             <CardHeader>
-              <CardTitle>Samba Global Configuration</CardTitle>
+              <div className="flex items-center justify-between">
+                <CardTitle>Samba Global Configuration</CardTitle>
+                {!editMode && sambaConfig.length > 0 && (
+                  <Button size="sm" onClick={handleEditMode} variant="outline">
+                    Edit Config
+                  </Button>
+                )}
+                {editMode && (
+                  <div className="flex gap-2">
+                    <Button size="sm" onClick={handleSaveConfig} disabled={saving}>
+                      {saving ? "Saving..." : "Save Changes"}
+                    </Button>
+                    <Button size="sm" onClick={() => setEditMode(false)} variant="outline" disabled={saving}>
+                      Cancel
+                    </Button>
+                  </div>
+                )}
+              </div>
             </CardHeader>
             <CardContent>
               {sambaConfig.length === 0 ? (
@@ -292,7 +335,18 @@ export default function SharesPage() {
                       {sambaConfig.map((param, idx) => (
                         <tr key={idx} className="border-b border-border/50 hover:bg-muted/30">
                           <td className="py-3 px-4 font-mono text-xs font-medium text-blue-600">{param.key}</td>
-                          <td className="py-3 px-4 text-xs font-mono break-all">{param.value}</td>
+                          <td className="py-3 px-4 text-xs">
+                            {editMode ? (
+                              <input
+                                type="text"
+                                value={editedConfig[param.key] || ""}
+                                onChange={(e) => setEditedConfig({ ...editedConfig, [param.key]: e.target.value })}
+                                className="w-full px-2 py-1 rounded border border-border bg-background text-xs font-mono"
+                              />
+                            ) : (
+                              <span className="font-mono break-all">{param.value}</span>
+                            )}
+                          </td>
                         </tr>
                       ))}
                     </tbody>

frontend/lib/api.ts

@@ -287,6 +287,11 @@ export class ZFSManagerAPI {
     return response.data
   }
 
+  async setSambaConfig(parameters: { [key: string]: string }): Promise<{ status: string }> {
+    const response = await this.client.put("/api/shares/samba/config", { parameters })
+    return response.data
+  }
+
   // Shares — NFS
   async getNfsShares(): Promise<NfsShare[]> {
     const response = await this.client.get("/api/shares/nfs")