feat: Add settings overview page with getAllPolicySettings

- Add new /settings-overview route displaying all policy settings in table
- Implement getAllPolicySettings() server action with tenant isolation
- Add 'All Settings' navigation item with Database icon
- Use date-fns for relative time display (lastSyncedAt)
- Server-side rendering for optimal performance

app/(app)/settings-overview/page.tsx

@@ -0,0 +1,100 @@
+import { getAllPolicySettings } from '@/lib/actions/policySettings';
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+import {
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow,
+} from '@/components/ui/table';
+import { formatDistanceToNow } from 'date-fns';
+import { de } from 'date-fns/locale';
+
+export default async function SettingsOverviewPage() {
+  const result = await getAllPolicySettings();
+
+  if (!result.success) {
+    return (
+      <main className="flex flex-1 flex-col gap-4 p-4 md:gap-8 md:p-8">
+        <div className="mx-auto w-full max-w-6xl">
+          <Card>
+            <CardHeader>
+              <CardTitle>Policy Settings Overview</CardTitle>
+              <CardDescription>
+                {result.error || 'Failed to load settings'}
+              </CardDescription>
+            </CardHeader>
+          </Card>
+        </div>
+      </main>
+    );
+  }
+
+  const settings = result.data || [];
+
+  return (
+    <main className="flex flex-1 flex-col gap-4 p-4 md:gap-8 md:p-8">
+      <div className="mx-auto w-full max-w-6xl">
+        <Card>
+          <CardHeader>
+            <CardTitle>Policy Settings Overview</CardTitle>
+            <CardDescription>
+              {settings.length} policy setting{settings.length !== 1 ? 's' : ''} found
+            </CardDescription>
+          </CardHeader>
+          <CardContent>
+            {settings.length === 0 ? (
+              <div className="flex flex-col items-center justify-center py-12 text-center">
+                <p className="text-muted-foreground">No policy settings found</p>
+                <p className="mt-2 text-sm text-muted-foreground">
+                  Try syncing your policies first
+                </p>
+              </div>
+            ) : (
+              <div className="rounded-md border">
+                <Table>
+                  <TableHeader>
+                    <TableRow>
+                      <TableHead>Policy Name</TableHead>
+                      <TableHead>Policy Type</TableHead>
+                      <TableHead>Setting Name</TableHead>
+                      <TableHead>Setting Value</TableHead>
+                      <TableHead className="text-right">Last Synced</TableHead>
+                    </TableRow>
+                  </TableHeader>
+                  <TableBody>
+                    {settings.map((setting) => (
+                      <TableRow key={setting.id}>
+                        <TableCell className="font-medium">
+                          {setting.policyName}
+                        </TableCell>
+                        <TableCell>
+                          <span className="inline-flex items-center rounded-md bg-blue-50 px-2 py-1 text-xs font-medium text-blue-700 ring-1 ring-inset ring-blue-700/10">
+                            {setting.policyType}
+                          </span>
+                        </TableCell>
+                        <TableCell className="font-mono text-xs">
+                          {setting.settingName}
+                        </TableCell>
+                        <TableCell className="max-w-md truncate">
+                          {setting.settingValue}
+                        </TableCell>
+                        <TableCell className="text-right text-sm text-muted-foreground">
+                          {formatDistanceToNow(new Date(setting.lastSyncedAt), {
+                            addSuffix: true,
+                            locale: de,
+                          })}
+                        </TableCell>
+                      </TableRow>
+                    ))}
+                  </TableBody>
+                </Table>
+              </div>
+            )}
+          </CardContent>
+        </Card>
+      </div>
+    </main>
+  );
+}

config/nav.ts

@@ -1,5 +1,5 @@
 import { SidebarLink } from "@/components/SidebarItems";
-import { Cog, Globe, User, HomeIcon, Search } from "lucide-react";
+import { Cog, Globe, User, HomeIcon, Search, Database } from "lucide-react";
 
 type AdditionalLinks = {
   title: string;
@@ -9,6 +9,7 @@ type AdditionalLinks = {
 export const defaultLinks: SidebarLink[] = [
   { href: "/dashboard", title: "Home", icon: HomeIcon },
   { href: "/search", title: "Search", icon: Search },
+  { href: "/settings-overview", title: "All Settings", icon: Database },
   { href: "/account", title: "Account", icon: User },
   { href: "/settings", title: "Settings", icon: Cog },
 ];

lib/actions/policySettings.ts

@@ -33,6 +33,13 @@ export interface RecentSettingsResult {
   error?: string;
 }
 
+export interface AllSettingsResult {
+  success: boolean;
+  data?: PolicySettingSearchResult[];
+  error?: string;
+  totalCount?: number;
+}
+
 /**
  * Search policy settings by keyword across settingName and settingValue
  * 
@@ -207,6 +214,53 @@ export async function getRecentPolicySettings(
   }
 }
 
+/**
+ * Get all policy settings for the current user's tenant
+ * 
+ * **Security**: Enforces tenant isolation with explicit WHERE tenantId filter
+ * 
+ * @returns All policy settings for user's tenant
+ */
+export async function getAllPolicySettings(): Promise<AllSettingsResult> {
+  try {
+    const { session } = await getUserAuth();
+    
+    // T017: Explicit security check
+    if (!session?.user) {
+      return { success: false, error: 'Unauthorized' };
+    }
+
+    // T017: Explicit security check
+    const tenantId = session.user.tenantId;
+    if (!tenantId) {
+      return { success: false, error: 'Tenant not found' };
+    }
+
+    // T017: Query filtered by tenantId for security
+    const results = await db
+      .select({
+        id: policySettings.id,
+        policyName: policySettings.policyName,
+        policyType: policySettings.policyType,
+        settingName: policySettings.settingName,
+        settingValue: policySettings.settingValue,
+        lastSyncedAt: policySettings.lastSyncedAt,
+      })
+      .from(policySettings)
+      .where(eq(policySettings.tenantId, tenantId)) // CRITICAL: Tenant isolation
+      .orderBy(desc(policySettings.lastSyncedAt));
+
+    return {
+      success: true,
+      data: results,
+      totalCount: results.length,
+    };
+  } catch (error) {
+    console.error('Get all settings failed:', error);
+    return { success: false, error: 'Failed to fetch settings' };
+  }
+}
+
 /**
  * TEMPORARY: Seed test data for the current user's tenant
  * This is a development helper to populate realistic policy settings