feat: add loading modal for container operations

- Add LoadingModal component with spinning circle animation
- Show loading modal during start/stop/destroy container operations
- Display current action being performed (e.g., 'Starting container 101...')
- Close loading modal when operation completes (success or error)
- Maintains consistent modal styling with existing components

Fixes user experience by providing clear visual feedback during
background operations instead of silent processing.

Author: michelroegl-brunner

src/app/_components/InstalledScriptsTab.tsx

@@ -8,6 +8,7 @@ import { Button } from './ui/button';
 import { ScriptInstallationCard } from './ScriptInstallationCard';
 import { ConfirmationModal } from './ConfirmationModal';
 import { ErrorModal } from './ErrorModal';
+import { LoadingModal } from './LoadingModal';
 import { getContrastColor } from '../../lib/colorUtils';
 import {
   DropdownMenu,
@@ -84,6 +85,12 @@ export function InstalledScriptsTab() {
     type?: 'error' | 'success';
   } | null>(null);
 
+  // Loading modal state
+  const [loadingModal, setLoadingModal] = useState<{
+    isOpen: boolean;
+    action: string;
+  } | null>(null);
+
   // Fetch installed scripts
   const { data: scriptsData, refetch: refetchScripts, isLoading } = api.installedScripts.getAllInstalledScripts.useQuery();
   const { data: statsData } = api.installedScripts.getInstallationStats.useQuery();
@@ -247,6 +254,7 @@ export function InstalledScriptsTab() {
 
   const controlContainerMutation = api.installedScripts.controlContainer.useMutation({
     onSuccess: (data, variables) => {
+      setLoadingModal(null);
       setControllingScriptId(null);
 
       if (data.success) {
@@ -287,6 +295,7 @@ export function InstalledScriptsTab() {
     },
     onError: (error) => {
       console.error('Container control error:', error);
+      setLoadingModal(null);
       setControllingScriptId(null);
 
       // Show detailed error message
@@ -302,6 +311,7 @@ export function InstalledScriptsTab() {
 
   const destroyContainerMutation = api.installedScripts.destroyContainer.useMutation({
     onSuccess: (data) => {
+      setLoadingModal(null);
       setControllingScriptId(null);
 
       if (data.success) {
@@ -326,6 +336,7 @@ export function InstalledScriptsTab() {
     },
     onError: (error) => {
       console.error('Container destroy error:', error);
+      setLoadingModal(null);
       setControllingScriptId(null);
 
       // Show detailed error message
@@ -515,6 +526,7 @@ export function InstalledScriptsTab() {
       message: `Are you sure you want to ${action} container ${script.container_id} (${script.script_name})?`,
       onConfirm: () => {
         setControllingScriptId(script.id);
+        setLoadingModal({ isOpen: true, action: `${action === 'start' ? 'Starting' : 'Stopping'} container ${script.container_id}...` });
         void controlContainerMutation.mutate({ id: script.id, action });
         setConfirmationModal(null);
       }
@@ -535,6 +547,7 @@ export function InstalledScriptsTab() {
       confirmText: script.container_id,
       onConfirm: () => {
         setControllingScriptId(script.id);
+        setLoadingModal({ isOpen: true, action: `Destroying container ${script.container_id}...` });
         void destroyContainerMutation.mutate({ id: script.id });
         setConfirmationModal(null);
       }
@@ -1566,6 +1579,14 @@ export function InstalledScriptsTab() {
             type={errorModal.type ?? 'error'}
           />
         )}
+
+        {/* Loading Modal */}
+        {loadingModal && (
+          <LoadingModal
+            isOpen={loadingModal.isOpen}
+            action={loadingModal.action}
+          />
+        )}
     </div>
   );
 }

src/app/_components/LoadingModal.tsx

@@ -0,0 +1,37 @@
+'use client';
+
+import { Loader2 } from 'lucide-react';
+
+interface LoadingModalProps {
+  isOpen: boolean;
+  action: string;
+}
+
+export function LoadingModal({ isOpen, action }: LoadingModalProps) {
+  if (!isOpen) return null;
+
+  return (
+    <div className="fixed inset-0 backdrop-blur-sm bg-black/50 flex items-center justify-center z-50 p-4">
+      <div className="bg-card rounded-lg shadow-xl max-w-md w-full border border-border p-8">
+        <div className="flex flex-col items-center space-y-4">
+          <div className="relative">
+            <Loader2 className="h-12 w-12 animate-spin text-primary" />
+            <div className="absolute inset-0 rounded-full border-2 border-primary/20 animate-pulse"></div>
+          </div>
+          <div className="text-center">
+            <h3 className="text-lg font-semibold text-card-foreground mb-2">
+              Processing
+            </h3>
+            <p className="text-sm text-muted-foreground">
+              {action}
+            </p>
+            <p className="text-xs text-muted-foreground mt-2">
+              Please wait...
+            </p>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+