diff --git a/.replit b/.replit
index 8962b7f..916350e 100644
--- a/.replit
+++ b/.replit
@@ -1,42 +1,12 @@
-modules = ["nodejs-20", "web", "postgresql-16"]
+modules = ["nodejs-20", "web"]
 run = "npm run dev"
-hidden = [".config", ".git", "generated-icon.png", "node_modules", "dist"]
 
 [nix]
-channel = "stable-24_05"
+channel = "stable-25_05"
 
 [deployment]
-deploymentTarget = "autoscale"
-build = ["npm", "run", "build"]
-run = ["npm", "run", "start"]
+run = ["sh", "-c", "npm run dev"]
 
 [[ports]]
-localPort = 5000
+localPort = 5001
 externalPort = 80
-
-[env]
-PORT = "5000"
-
-[workflows]
-runButton = "Project"
-
-[[workflows.workflow]]
-name = "Project"
-mode = "parallel"
-author = "agent"
-
-[[workflows.workflow.tasks]]
-task = "workflow.run"
-args = "Start application"
-
-[[workflows.workflow]]
-name = "Start application"
-author = "agent"
-
-[[workflows.workflow.tasks]]
-task = "shell.exec"
-args = "npm run dev"
-waitForPort = 5000
-
-[agent]
-integrations = ["javascript_mem_db==1.0.0", "javascript_websocket==1.0.0"]
diff --git a/client/src/App.tsx b/client/src/App.tsx
index a253570..15d6aaa 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -4,12 +4,14 @@ import { QueryClientProvider } from "@tanstack/react-query";
 import { Toaster } from "@/components/ui/toaster";
 import { TooltipProvider } from "@/components/ui/tooltip";
 import CanvasPage from "@/pages/canvas";
+import AdminPage from "@/pages/admin";
 import NotFound from "@/pages/not-found";
 
 function Router() {
   return (
     <Switch>
       <Route path="/" component={CanvasPage} />
+      <Route path="/admin" component={AdminPage} />
       <Route component={NotFound} />
     </Switch>
   );
diff --git a/client/src/lib/canvas-api.ts b/client/src/lib/canvas-api.ts
new file mode 100644
index 0000000..e5e73e3
--- /dev/null
+++ b/client/src/lib/canvas-api.ts
@@ -0,0 +1,12 @@
+
+import { apiRequest } from "./queryClient";
+
+export interface ExpandCanvasRequest {
+  canvasWidth: number;
+  canvasHeight: number;
+}
+
+export const expandCanvas = async (dimensions: ExpandCanvasRequest) => {
+  const response = await apiRequest("POST", "/api/config/expand", dimensions);
+  return response.json();
+};
diff --git a/client/src/pages/admin.tsx b/client/src/pages/admin.tsx
new file mode 100644
index 0000000..41b831c
--- /dev/null
+++ b/client/src/pages/admin.tsx
@@ -0,0 +1,382 @@
+
+import { useState, useEffect } from "react";
+import { useQuery, useMutation } from "@tanstack/react-query";
+import { queryClient } from "@/lib/queryClient";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Card, CardHeader, CardTitle, CardContent } from "@/components/ui/card";
+import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
+import { Badge } from "@/components/ui/badge";
+import { useToast } from "@/hooks/use-toast";
+import { Pixel, CanvasConfig } from "@shared/schema";
+import { apiRequest } from "@/lib/queryClient";
+import { AuthBanner } from "@/components/auth-banner";
+
+export default function AdminPage() {
+  const [adminKey, setAdminKey] = useState("");
+  const [isAuthenticated, setIsAuthenticated] = useState(false);
+  const [selectedPixelId, setSelectedPixelId] = useState("");
+  const [canvasWidth, setCanvasWidth] = useState(500);
+  const [canvasHeight, setCanvasHeight] = useState(200);
+  const { toast } = useToast();
+
+  // Auth check
+  const checkAuth = async (key: string) => {
+    try {
+      const response = await apiRequest("POST", "/api/admin/auth", { adminKey: key });
+      if (response.ok) {
+        setIsAuthenticated(true);
+        localStorage.setItem("adminKey", key);
+        toast({ title: "Admin-Zugang gewährt" });
+      } else {
+        throw new Error("Invalid key");
+      }
+    } catch (error) {
+      toast({ 
+        title: "Ungültiger Admin-Schlüssel", 
+        variant: "destructive" 
+      });
+    }
+  };
+
+  // Check saved auth on load
+  useEffect(() => {
+    const savedKey = localStorage.getItem("adminKey");
+    if (savedKey) {
+      setAdminKey(savedKey);
+      checkAuth(savedKey);
+    }
+  }, []);
+
+  // Fetch data
+  const { data: pixels = [], refetch: refetchPixels } = useQuery<Pixel[]>({
+    queryKey: ['/api/pixels'],
+    enabled: isAuthenticated,
+  });
+
+  const { data: config } = useQuery<CanvasConfig>({
+    queryKey: ['/api/config'],
+    enabled: isAuthenticated,
+  });
+
+  const { data: adminStats } = useQuery({
+    queryKey: ['/api/admin/stats'],
+    enabled: isAuthenticated,
+    queryFn: async () => {
+      const response = await apiRequest("GET", "/api/admin/stats", undefined, {
+        'X-Admin-Key': adminKey
+      });
+      return response.json();
+    },
+  });
+
+  // Mutations
+  const deletePixelMutation = useMutation({
+    mutationFn: async (pixelId: string) => {
+      const response = await apiRequest("DELETE", `/api/admin/pixels/${pixelId}`, undefined, {
+        'X-Admin-Key': adminKey
+      });
+      return response.json();
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['/api/pixels'] });
+      queryClient.invalidateQueries({ queryKey: ['/api/admin/stats'] });
+      toast({ title: "Pixel gelöscht" });
+    },
+  });
+
+  const clearCanvasMutation = useMutation({
+    mutationFn: async () => {
+      const response = await apiRequest("DELETE", "/api/admin/canvas", undefined, {
+        'X-Admin-Key': adminKey
+      });
+      return response.json();
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['/api/pixels'] });
+      queryClient.invalidateQueries({ queryKey: ['/api/admin/stats'] });
+      toast({ title: "Canvas geleert" });
+    },
+  });
+
+  const expandCanvasMutation = useMutation({
+    mutationFn: async ({ width, height }: { width: number; height: number }) => {
+      const response = await apiRequest("POST", "/api/config/expand", { 
+        canvasWidth: width, 
+        canvasHeight: height 
+      }, {
+        'X-Admin-Key': adminKey
+      });
+      return response.json();
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['/api/config'] });
+      toast({ title: "Canvas erweitert" });
+    },
+  });
+
+  const exportCanvasMutation = useMutation({
+    mutationFn: async () => {
+      const response = await apiRequest("POST", "/api/admin/export", undefined, {
+        'X-Admin-Key': adminKey
+      });
+      return response.json();
+    },
+    onSuccess: (data) => {
+      toast({ title: "Canvas exportiert", description: `Datei: ${data.filename}` });
+    },
+  });
+
+  if (!isAuthenticated) {
+    return (
+      <div className="min-h-screen bg-canvas-bg text-white flex items-center justify-center">
+        <Card className="w-96 bg-panel-bg border-gray-700">
+          <CardHeader>
+            <CardTitle className="text-white">Admin-Zugang</CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            <Input
+              type="password"
+              placeholder="Admin-Schlüssel eingeben"
+              value={adminKey}
+              onChange={(e) => setAdminKey(e.target.value)}
+              className="bg-panel-hover border-gray-600 text-white"
+            />
+            <Button 
+              onClick={() => checkAuth(adminKey)}
+              className="w-full"
+              disabled={!adminKey}
+            >
+              Anmelden
+            </Button>
+          </CardContent>
+        </Card>
+      </div>
+    );
+  }
+
+  return (
+    <div className="min-h-screen bg-canvas-bg text-white">
+      <AuthBanner />
+      <div className="container mx-auto p-6">
+        <div className="flex items-center justify-between mb-6">
+          <h1 className="text-3xl font-bold">Admin-Panel</h1>
+          <Button 
+            variant="outline" 
+            onClick={() => {
+              setIsAuthenticated(false);
+              localStorage.removeItem("adminKey");
+            }}
+          >
+            Abmelden
+          </Button>
+        </div>
+
+        <Tabs defaultValue="overview" className="space-y-6">
+          <TabsList className="bg-panel-bg">
+            <TabsTrigger value="overview">Übersicht</TabsTrigger>
+            <TabsTrigger value="moderation">Moderation</TabsTrigger>
+            <TabsTrigger value="canvas">Canvas-Verwaltung</TabsTrigger>
+            <TabsTrigger value="export">Export</TabsTrigger>
+          </TabsList>
+
+          <TabsContent value="overview">
+            <div className="grid grid-cols-1 md:grid-cols-3 gap-6">
+              <Card className="bg-panel-bg border-gray-700">
+                <CardHeader>
+                  <CardTitle className="text-white">Statistiken</CardTitle>
+                </CardHeader>
+                <CardContent className="text-white">
+                  <div className="space-y-2">
+                    <div className="flex justify-between">
+                      <span>Gesamte Pixel:</span>
+                      <Badge>{adminStats?.totalPixels || 0}</Badge>
+                    </div>
+                    <div className="flex justify-between">
+                      <span>Einzigartige Nutzer:</span>
+                      <Badge>{adminStats?.uniqueUsers || 0}</Badge>
+                    </div>
+                    <div className="flex justify-between">
+                      <span>Canvas-Größe:</span>
+                      <Badge>{config?.canvasWidth}×{config?.canvasHeight}</Badge>
+                    </div>
+                  </div>
+                </CardContent>
+              </Card>
+
+              <Card className="bg-panel-bg border-gray-700">
+                <CardHeader>
+                  <CardTitle className="text-white">Letzte Aktivität</CardTitle>
+                </CardHeader>
+                <CardContent className="text-white">
+                  <div className="space-y-2 max-h-40 overflow-y-auto">
+                    {pixels.slice(0, 5).map((pixel) => (
+                      <div key={pixel.id} className="text-sm">
+                        <span className="text-muted">{pixel.username}</span> - 
+                        <span className="ml-1">({pixel.x}, {pixel.y})</span>
+                      </div>
+                    ))}
+                  </div>
+                </CardContent>
+              </Card>
+
+              <Card className="bg-panel-bg border-gray-700">
+                <CardHeader>
+                  <CardTitle className="text-white">System</CardTitle>
+                </CardHeader>
+                <CardContent className="text-white">
+                  <div className="space-y-2">
+                    <div className="flex justify-between">
+                      <span>Cooldown:</span>
+                      <Badge>{config?.defaultCooldown}s</Badge>
+                    </div>
+                    <div className="flex justify-between">
+                      <span>Auto-Events:</span>
+                      <Badge variant={config?.enableAutomaticEvents ? "default" : "secondary"}>
+                        {config?.enableAutomaticEvents ? "An" : "Aus"}
+                      </Badge>
+                    </div>
+                  </div>
+                </CardContent>
+              </Card>
+            </div>
+          </TabsContent>
+
+          <TabsContent value="moderation">
+            <div className="space-y-6">
+              <Card className="bg-panel-bg border-gray-700">
+                <CardHeader>
+                  <CardTitle className="text-white">Pixel-Moderation</CardTitle>
+                </CardHeader>
+                <CardContent className="space-y-4">
+                  <div className="flex space-x-2">
+                    <Input
+                      placeholder="Pixel-ID eingeben"
+                      value={selectedPixelId}
+                      onChange={(e) => setSelectedPixelId(e.target.value)}
+                      className="bg-panel-hover border-gray-600 text-white"
+                    />
+                    <Button 
+                      onClick={() => deletePixelMutation.mutate(selectedPixelId)}
+                      disabled={!selectedPixelId}
+                      variant="destructive"
+                    >
+                      Pixel löschen
+                    </Button>
+                  </div>
+                  
+                  <div className="border-t border-gray-600 pt-4">
+                    <Button 
+                      onClick={() => clearCanvasMutation.mutate()}
+                      variant="destructive"
+                      className="w-full"
+                    >
+                      Gesamtes Canvas leeren
+                    </Button>
+                  </div>
+                </CardContent>
+              </Card>
+
+              <Card className="bg-panel-bg border-gray-700">
+                <CardHeader>
+                  <CardTitle className="text-white">Pixel-Liste</CardTitle>
+                </CardHeader>
+                <CardContent>
+                  <div className="max-h-60 overflow-y-auto space-y-2">
+                    {pixels.slice().reverse().slice(0, 20).map((pixel) => (
+                      <div key={pixel.id} className="flex items-center justify-between p-2 bg-panel-hover rounded">
+                        <div className="text-white text-sm">
+                          <span className="font-mono">{pixel.id.slice(0, 8)}</span> - 
+                          <span className="ml-2">{pixel.username}</span> - 
+                          <span className="ml-2">({pixel.x}, {pixel.y})</span> - 
+                          <span 
+                            className="ml-2 inline-block w-4 h-4 rounded" 
+                            style={{ backgroundColor: pixel.color }}
+                          />
+                        </div>
+                        <Button 
+                          size="sm" 
+                          variant="destructive"
+                          onClick={() => deletePixelMutation.mutate(pixel.id)}
+                        >
+                          Löschen
+                        </Button>
+                      </div>
+                    ))}
+                  </div>
+                </CardContent>
+              </Card>
+            </div>
+          </TabsContent>
+
+          <TabsContent value="canvas">
+            <Card className="bg-panel-bg border-gray-700">
+              <CardHeader>
+                <CardTitle className="text-white">Canvas-Verwaltung</CardTitle>
+              </CardHeader>
+              <CardContent className="space-y-4">
+                <div className="grid grid-cols-2 gap-4">
+                  <div>
+                    <label className="text-white text-sm">Breite</label>
+                    <Input
+                      type="number"
+                      value={canvasWidth}
+                      onChange={(e) => setCanvasWidth(Number(e.target.value))}
+                      className="bg-panel-hover border-gray-600 text-white"
+                    />
+                  </div>
+                  <div>
+                    <label className="text-white text-sm">Höhe</label>
+                    <Input
+                      type="number"
+                      value={canvasHeight}
+                      onChange={(e) => setCanvasHeight(Number(e.target.value))}
+                      className="bg-panel-hover border-gray-600 text-white"
+                    />
+                  </div>
+                </div>
+                
+                <Button 
+                  onClick={() => expandCanvasMutation.mutate({ 
+                    width: canvasWidth, 
+                    height: canvasHeight 
+                  })}
+                  className="w-full"
+                >
+                  Canvas erweitern
+                </Button>
+                
+                <div className="text-sm text-muted">
+                  Aktuelle Größe: {config?.canvasWidth}×{config?.canvasHeight}
+                  <br />
+                  Hinweis: Canvas kann nur erweitert, nicht verkleinert werden.
+                </div>
+              </CardContent>
+            </Card>
+          </TabsContent>
+
+          <TabsContent value="export">
+            <Card className="bg-panel-bg border-gray-700">
+              <CardHeader>
+                <CardTitle className="text-white">Export-Verwaltung</CardTitle>
+              </CardHeader>
+              <CardContent className="space-y-4">
+                <Button 
+                  onClick={() => exportCanvasMutation.mutate()}
+                  className="w-full"
+                >
+                  Manueller SVG-Export
+                </Button>
+                
+                <div className="text-sm text-muted">
+                  Automatische Exports erfolgen alle {config?.exportInterval || 60} Sekunden.
+                  Dateien werden im exports/ Verzeichnis gespeichert.
+                </div>
+              </CardContent>
+            </Card>
+          </TabsContent>
+        </Tabs>
+      </div>
+    </div>
+  );
+}
diff --git a/client/src/pages/canvas.tsx b/client/src/pages/canvas.tsx
index ec05a72..4b449ab 100644
--- a/client/src/pages/canvas.tsx
+++ b/client/src/pages/canvas.tsx
@@ -43,13 +43,15 @@ export default function CanvasPage() {
         queryClient.invalidateQueries({ queryKey: ['/api/pixels'] });
         queryClient.invalidateQueries({ queryKey: ['/api/recent'] });
 
-        //toast({
-        //  title: "Pixel placed",
-        //  description: `${message.data.username} placed a pixel at (${message.data.x}, ${message.data.y})`,
-        //  });
-        //break;
-
-
+        // Aktualisiere Cooldown nach jedem Pixel-Placement (auch von anderen Nutzern)
+        // um sicherzustellen, dass lokaler State mit Server synchron ist
+        if (userId) {
+          fetch(`/api/cooldown/${userId}`)
+            .then(res => res.json())
+            .then(data => setCooldownSeconds(data.remainingSeconds))
+            .catch(error => console.error("Failed to sync cooldown:", error));
+        }
+        break;
 
       case "cooldown_update":
         if (message.data.userId === userId) {
@@ -67,12 +69,21 @@ export default function CanvasPage() {
       const response = await apiRequest("POST", "/api/pixels", pixel);
       return response.json();
     },
-    onSuccess: () => {
+    onSuccess: async () => {
       queryClient.invalidateQueries({ queryKey: ['/api/pixels'] });
       queryClient.invalidateQueries({ queryKey: ['/api/recent'] });
-      // Start cooldown countdown
-      if (config && !config.enableAutomaticEvents) {
-        setCooldownSeconds(config.defaultCooldown);
+      
+      // Hole den aktuellen Cooldown-Status vom Server
+      try {
+        const cooldownResponse = await fetch(`/api/cooldown/${userId}`);
+        const cooldownData = await cooldownResponse.json();
+        setCooldownSeconds(cooldownData.remainingSeconds);
+      } catch (error) {
+        console.error("Failed to fetch cooldown after placement:", error);
+        // Fallback: Setze Standard-Cooldown wenn Server-Abfrage fehlschlägt
+        if (config && !config.enableAutomaticEvents) {
+          setCooldownSeconds(config.defaultCooldown);
+        }
       }
     },
     onError: (error: any) => {
@@ -118,10 +129,14 @@ export default function CanvasPage() {
       }
     };
 
-    if (userId) {
+    if (userId && config) {
       fetchCooldown();
+      
+      // Aktualisiere Cooldown regelmäßig für den Fall, dass er anderswo gesetzt wurde
+      const interval = setInterval(fetchCooldown, 2000);
+      return () => clearInterval(interval);
     }
-  }, [userId]);
+  }, [userId, config]);
 
   const handlePixelClick = (x: number, y: number) => {
     if (cooldownSeconds > 0) return;
@@ -160,9 +175,14 @@ export default function CanvasPage() {
         </div>
 
         <div className="flex items-center space-x-3">
-
-
-
+          {/* Admin Link */}
+          <Button 
+            variant="outline" 
+            size="sm"
+            onClick={() => window.location.href = '/admin'}
+          >
+            Admin
+          </Button>
 
           {/* User Info */}
           <div className="flex items-center space-x-2 px-3 py-2 bg-panel-hover rounded-lg">
diff --git a/package-lock.json b/package-lock.json
index bd1d01a..026c370 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -40,6 +40,8 @@
         "@radix-ui/react-toggle-group": "^1.1.3",
         "@radix-ui/react-tooltip": "^1.2.0",
         "@tanstack/react-query": "^5.60.5",
+        "@types/better-sqlite3": "^7.6.13",
+        "better-sqlite3": "^12.2.0",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "cmdk": "^1.1.1",
@@ -3334,6 +3336,15 @@
         "@babel/types": "^7.20.7"
       }
     },
+    "node_modules/@types/better-sqlite3": {
+      "version": "7.6.13",
+      "resolved": "https://registry.npmjs.org/@types/better-sqlite3/-/better-sqlite3-7.6.13.tgz",
+      "integrity": "sha512-NMv9ASNARoKksWtsq/SHakpYAYnhBrQgGD8zkLYk/jaK8jUGn08CfEdTRgYhMypUQAfzSP8W6gNLe0q19/t4VA==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/body-parser": {
       "version": "1.19.5",
       "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.5.tgz",
@@ -3823,6 +3834,26 @@
       "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
       "license": "MIT"
     },
+    "node_modules/base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/basic-ftp": {
       "version": "5.0.5",
       "resolved": "https://registry.npmjs.org/basic-ftp/-/basic-ftp-5.0.5.tgz",
@@ -3833,6 +3864,20 @@
         "node": ">=10.0.0"
       }
     },
+    "node_modules/better-sqlite3": {
+      "version": "12.2.0",
+      "resolved": "https://registry.npmjs.org/better-sqlite3/-/better-sqlite3-12.2.0.tgz",
+      "integrity": "sha512-eGbYq2CT+tos1fBwLQ/tkBt9J5M3JEHjku4hbvQUePCckkvVf14xWj+1m7dGoK81M/fOjFT7yM9UMeKT/+vFLQ==",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "dependencies": {
+        "bindings": "^1.5.0",
+        "prebuild-install": "^7.1.1"
+      },
+      "engines": {
+        "node": "20.x || 22.x || 23.x || 24.x"
+      }
+    },
     "node_modules/binary-extensions": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.3.0.tgz",
@@ -3845,6 +3890,26 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/bindings": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz",
+      "integrity": "sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==",
+      "license": "MIT",
+      "dependencies": {
+        "file-uri-to-path": "1.0.0"
+      }
+    },
+    "node_modules/bl": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
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+    },
     "node_modules/sucrase": {
       "version": "3.35.0",
       "resolved": "https://registry.npmjs.org/sucrase/-/sucrase-3.35.0.tgz",
@@ -8462,6 +8805,34 @@
         "node": ">=6"
       }
     },
+    "node_modules/tar-fs": {
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.1.3.tgz",
+      "integrity": "sha512-090nwYJDmlhwFwEW3QQl+vaNnxsO2yVsd45eTKRBzSzu+hlb1w2K9inVq5b0ngXuLVqQ4ApvsUHHnu/zQNkWAg==",
+      "license": "MIT",
+      "dependencies": {
+        "chownr": "^1.1.1",
+        "mkdirp-classic": "^0.5.2",
+        "pump": "^3.0.0",
+        "tar-stream": "^2.1.4"
+      }
+    },
+    "node_modules/tar-stream": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.2.0.tgz",
+      "integrity": "sha512-ujeqbceABgwMZxEJnk2HDY2DlnUZ+9oEcb1KzTVfYHio0UE6dG71n60d8D2I4qNvleWrrXpmjpt7vZeF1LnMZQ==",
+      "license": "MIT",
+      "dependencies": {
+        "bl": "^4.0.3",
+        "end-of-stream": "^1.4.1",
+        "fs-constants": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^3.1.1"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/tcp-port-used": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/tcp-port-used/-/tcp-port-used-1.0.2.tgz",
@@ -9026,6 +9397,18 @@
         "@esbuild/win32-x64": "0.23.1"
       }
     },
+    "node_modules/tunnel-agent": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+      "integrity": "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "safe-buffer": "^5.0.1"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
     "node_modules/tw-animate-css": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/tw-animate-css/-/tw-animate-css-1.2.5.tgz",
@@ -9841,8 +10224,7 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
-      "license": "ISC",
-      "optional": true
+      "license": "ISC"
     },
     "node_modules/ws": {
       "version": "8.18.0",
diff --git a/package.json b/package.json
index 883b927..9e083da 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,8 @@
     "@radix-ui/react-toggle-group": "^1.1.3",
     "@radix-ui/react-tooltip": "^1.2.0",
     "@tanstack/react-query": "^5.60.5",
+    "@types/better-sqlite3": "^7.6.13",
+    "better-sqlite3": "^12.2.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
diff --git a/server/config.ts b/server/config.ts
index 06c5725..60264a6 100644
--- a/server/config.ts
+++ b/server/config.ts
@@ -11,6 +11,7 @@ interface Config {
 
   autoExportIntervalSeconds: number;
   exportPath: string;
+  adminKey: string;
 
   enableKeycloak: boolean;
   keycloakRealm: string;
@@ -22,87 +23,44 @@ function parseConfigFile(): Config {
   try {
     const configPath = join(process.cwd(), "config.cfg");
     const configContent = readFileSync(configPath, "utf-8");
-    
-    const config: Partial<Config> = {};
-    
+
+    const configMap = new Map<string, string>();
     configContent.split("\n").forEach(line => {
       line = line.trim();
       if (line.startsWith("#") || !line.includes("=")) return;
-      
       const [key, value] = line.split("=");
-      const trimmedKey = key.trim();
-      const trimmedValue = value.trim();
-      
-      switch (trimmedKey) {
-        case "CANVAS_WIDTH":
-          config.canvasWidth = parseInt(trimmedValue);
-          break;
-        case "CANVAS_HEIGHT":
-          config.canvasHeight = parseInt(trimmedValue);
-          break;
-        case "DEFAULT_COOLDOWN":
-          config.defaultCooldown = parseInt(trimmedValue);
-          break;
-        case "ENABLE_AUTOMATIC_EVENTS":
-          config.enableAutomaticEvents = trimmedValue.toLowerCase() === "true";
-          break;
-        case "EVENT_DURATION_MINUTES":
-          config.eventDurationMinutes = parseInt(trimmedValue);
-          break;
-        case "EVENT_INTERVAL_HOURS":
-          config.eventIntervalHours = parseInt(trimmedValue);
-          break;
-
-        case "AUTO_EXPORT_INTERVAL_SECONDS":
-          config.autoExportIntervalSeconds = parseInt(trimmedValue);
-          break;
-        case "EXPORT_PATH":
-          config.exportPath = trimmedValue;
-          break;
-        case "ENABLE_KEYCLOAK":
-          config.enableKeycloak = trimmedValue.toLowerCase() === "true";
-          break;
-        case "KEYCLOAK_REALM":
-          config.keycloakRealm = trimmedValue;
-          break;
-        case "KEYCLOAK_AUTH_URL":
-          config.keycloakAuthUrl = trimmedValue;
-          break;
-        case "KEYCLOAK_CLIENT_ID":
-          config.keycloakClientId = trimmedValue;
-          break;
-      }
+      configMap.set(key.trim(), value.trim());
     });
-    
-    // Set defaults for missing values
+
+
     return {
-      canvasWidth: config.canvasWidth || 100,
-      canvasHeight: config.canvasHeight || 100,
-      defaultCooldown: config.defaultCooldown || 5,
-      enableAutomaticEvents: config.enableAutomaticEvents || false,
-      eventDurationMinutes: config.eventDurationMinutes || 30,
-      eventIntervalHours: config.eventIntervalHours || 6,
-
-      autoExportIntervalSeconds: config.autoExportIntervalSeconds || 60,
-      exportPath: config.exportPath || "./exports/",
-
-      enableKeycloak: config.enableKeycloak || false,
-      keycloakRealm: config.keycloakRealm || "rplace",
-      keycloakAuthUrl: config.keycloakAuthUrl || "http://localhost:8080/auth",
-      keycloakClientId: config.keycloakClientId || "rplace-client",
+      canvasWidth: parseInt(configMap.get('CANVAS_WIDTH') || '500'),
+      canvasHeight: parseInt(configMap.get('CANVAS_HEIGHT') || '200'),
+      defaultCooldown: parseInt(configMap.get('DEFAULT_COOLDOWN') || '10'),
+      enableAutomaticEvents: configMap.get('ENABLE_AUTOMATIC_EVENTS') === 'true',
+      eventDurationMinutes: parseInt(configMap.get('EVENT_DURATION_MINUTES') || '30'),
+      eventIntervalHours: parseInt(configMap.get('EVENT_INTERVAL_HOURS') || '1'),
+      autoExportIntervalSeconds: parseInt(configMap.get('AUTO_EXPORT_INTERVAL_SECONDS') || '60'),
+      exportPath: configMap.get('EXPORT_PATH') || './exports/',
+      adminKey: configMap.get('ADMIN_KEY') || 'admin123',
+      enableKeycloak: configMap.get('ENABLE_KEYCLOAK') === 'true',
+      keycloakRealm: configMap.get('KEYCLOAK_REALM') || 'rplace',
+      keycloakAuthUrl: configMap.get('KEYCLOAK_AUTH_URL') || 'http://localhost:8080/auth',
+      keycloakClientId: configMap.get('KEYCLOAK_CLIENT_ID') || 'rplace-client',
     };
   } catch (error) {
     console.error("Error reading config file, using defaults:", error);
     return {
-      canvasWidth: 100,
-      canvasHeight: 100,
-      defaultCooldown: 5,
+      canvasWidth: 500,
+      canvasHeight: 200,
+      defaultCooldown: 10,
       enableAutomaticEvents: false,
       eventDurationMinutes: 30,
-      eventIntervalHours: 6,
+      eventIntervalHours: 1,
 
       autoExportIntervalSeconds: 60,
       exportPath: "./exports/",
+      adminKey: 'admin123',
 
       enableKeycloak: false,
       keycloakRealm: "rplace",
diff --git a/server/index.ts b/server/index.ts
index 687085f..0449d56 100644
--- a/server/index.ts
+++ b/server/index.ts
@@ -3,6 +3,8 @@ import { registerRoutes } from "./routes";
 import { setupVite, serveStatic, log } from "./vite";
 import { setupKeycloak } from "./keycloak";
 import { config } from "./config";
+import { storage } from "./storage";
+import { CanvasExporter } from "./export";
 
 const app = express();
 app.use(express.json());
@@ -15,7 +17,7 @@ if (config.enableKeycloak) {
   process.env.KEYCLOAK_REALM = config.keycloakRealm;
   process.env.KEYCLOAK_AUTH_URL = config.keycloakAuthUrl;
   process.env.KEYCLOAK_CLIENT_ID = config.keycloakClientId;
-  
+
   keycloak = setupKeycloak(app);
   log("Keycloak authentication enabled");
 } else {
@@ -72,6 +74,42 @@ app.use((req, res, next) => {
     serveStatic(app);
   }
 
+  // Aktualisiere Canvas-Konfiguration beim Start falls sich config.cfg geändert hat
+  try {
+    const currentConfig = await storage.getCanvasConfig();
+    const configChanged =
+      currentConfig.canvasWidth !== config.canvasWidth ||
+      currentConfig.canvasHeight !== config.canvasHeight ||
+      currentConfig.defaultCooldown !== config.defaultCooldown ||
+      currentConfig.enableAutomaticEvents !== config.enableAutomaticEvents ||
+      currentConfig.eventDuration !== config.eventDurationMinutes ||
+      currentConfig.eventInterval !== config.eventIntervalHours;
+
+    if (configChanged) {
+      console.log(`${formatTime()} [express] Aktualisiere Canvas-Konfiguration aus config.cfg`);
+
+      // Für SQLite Storage: Verwende expandCanvas wenn Canvas vergrößert wird
+      if ('expandCanvas' in storage && typeof storage.expandCanvas === 'function' &&
+          (config.canvasWidth > currentConfig.canvasWidth || config.canvasHeight > currentConfig.canvasHeight)) {
+        await (storage as any).expandCanvas(config.canvasWidth, config.canvasHeight);
+      } else {
+        await storage.updateCanvasConfig({
+          canvasWidth: Math.max(currentConfig.canvasWidth, config.canvasWidth), // Erlaube nur Erweiterung
+          canvasHeight: Math.max(currentConfig.canvasHeight, config.canvasHeight), // Erlaube nur Erweiterung
+          defaultCooldown: config.defaultCooldown,
+          enableAutomaticEvents: config.enableAutomaticEvents,
+          eventDuration: config.eventDurationMinutes,
+          eventInterval: config.eventIntervalHours
+        });
+      }
+      console.log(`${formatTime()} [express] Canvas-Konfiguration aktualisiert`);
+    }
+  } catch (error) {
+    console.error(`${formatTime()} [express] Fehler beim Aktualisieren der Canvas-Konfiguration:`, error);
+  }
+
+  // Canvas exporter wird bereits in routes.ts initialisiert
+
   // ALWAYS serve the app on the port specified in the environment variable PORT
   // Other ports are firewalled. Default to 5000 if not specified.
   // this serves both the API and the client.
@@ -85,3 +123,11 @@ app.use((req, res, next) => {
     log(`serving on port ${port}`);
   });
 })();
+
+function formatTime() {
+  const now = new Date();
+  const hours = String(now.getHours()).padStart(2, '0');
+  const minutes = String(now.getMinutes()).padStart(2, '0');
+  const seconds = String(now.getSeconds()).padStart(2, '0');
+  return `[${hours}:${minutes}:${seconds}]`;
+}
\ No newline at end of file
diff --git a/server/routes.ts b/server/routes.ts
index b8bc48b..8f3dc8d 100644
--- a/server/routes.ts
+++ b/server/routes.ts
@@ -6,6 +6,17 @@ import { insertPixelSchema, insertUserCooldownSchema, type WSMessage } from "@sh
 import { CanvasExporter } from "./export";
 import { config } from "./config";
 
+// Admin authentication middleware
+function requireAdmin(req: Request, res: Response, next: NextFunction) {
+  const adminKey = req.headers['x-admin-key'] || req.body.adminKey;
+  
+  if (!adminKey || adminKey !== config.adminKey) {
+    return res.status(401).json({ message: "Admin access required" });
+  }
+  
+  next();
+}
+
 // Authentication middleware
 function requireAuth(req: Request, res: Response, next: NextFunction) {
   if (!config.enableKeycloak) {
@@ -99,6 +110,48 @@ export async function registerRoutes(app: Express): Promise<Server> {
     }
   });
 
+  // Canvas-Erweiterungs-Endpoint
+  app.post("/api/config/expand", async (req, res) => {
+    try {
+      const { canvasWidth, canvasHeight } = req.body;
+      
+      if (!canvasWidth || !canvasHeight || canvasWidth < 1 || canvasHeight < 1) {
+        return res.status(400).json({ message: "Invalid canvas dimensions" });
+      }
+
+      const currentConfig = await storage.getCanvasConfig();
+      
+      // Erlaube nur Erweiterung, nicht Verkleinerung
+      if (canvasWidth < currentConfig.canvasWidth || canvasHeight < currentConfig.canvasHeight) {
+        return res.status(400).json({ 
+          message: "Canvas kann nur erweitert werden, nicht verkleinert",
+          current: { width: currentConfig.canvasWidth, height: currentConfig.canvasHeight }
+        });
+      }
+
+      // Für SQLite Storage: Verwende spezielle expandCanvas Methode
+      if ('expandCanvas' in storage && typeof storage.expandCanvas === 'function') {
+        await (storage as any).expandCanvas(canvasWidth, canvasHeight);
+      } else {
+        // Fallback für Memory Storage
+        await storage.updateCanvasConfig({
+          canvasWidth,
+          canvasHeight,
+          defaultCooldown: currentConfig.defaultCooldown,
+          enableAutomaticEvents: currentConfig.enableAutomaticEvents,
+          eventDuration: currentConfig.eventDuration,
+          eventInterval: currentConfig.eventInterval
+        });
+      }
+
+      const updatedConfig = await storage.getCanvasConfig();
+      res.json(updatedConfig);
+    } catch (error) {
+      console.error("Failed to expand canvas:", error);
+      res.status(500).json({ message: "Failed to expand canvas" });
+    }
+  });
+
   // Config is now read-only from file
   // Remove the POST endpoint for config updates
 
@@ -121,11 +174,17 @@ export async function registerRoutes(app: Express): Promise<Server> {
       // Check cooldown unless events are enabled
       if (!config.enableAutomaticEvents) {
         const cooldown = await storage.getUserCooldown(userInfo.userId);
-        if (cooldown && cooldown.cooldownEnds > new Date()) {
-          return res.status(429).json({ message: "Cooldown active" });
+        const now = new Date();
+        
+        if (cooldown && cooldown.cooldownEnds > now) {
+          const remaining = Math.ceil((cooldown.cooldownEnds.getTime() - now.getTime()) / 1000);
+          return res.status(429).json({ 
+            message: "Cooldown active", 
+            remainingSeconds: remaining 
+          });
         }
         
-        // Set new cooldown
+        // Set new cooldown - immer setzen, auch wenn kein vorheriger existierte
         const cooldownEnd = new Date(Date.now() + (config.defaultCooldown * 1000));
         await storage.setUserCooldown({
           userId: userInfo.userId,
@@ -226,6 +285,83 @@ export async function registerRoutes(app: Express): Promise<Server> {
     });
   });
 
+  // Admin Routes
+  app.post("/api/admin/auth", (req, res) => {
+    const { adminKey } = req.body;
+    
+    if (adminKey === config.adminKey) {
+      res.json({ success: true });
+    } else {
+      res.status(401).json({ message: "Invalid admin key" });
+    }
+  });
+
+  app.get("/api/admin/stats", requireAdmin, async (req, res) => {
+    try {
+      const pixels = await storage.getAllPixels();
+      const uniqueUsers = new Set(pixels.map(p => p.userId)).size;
+      
+      res.json({
+        totalPixels: pixels.length,
+        uniqueUsers,
+        lastActivity: pixels.length > 0 ? pixels[pixels.length - 1].createdAt : null
+      });
+    } catch (error) {
+      res.status(500).json({ message: "Failed to fetch admin stats" });
+    }
+  });
+
+  app.delete("/api/admin/pixels/:id", requireAdmin, async (req, res) => {
+    try {
+      const { id } = req.params;
+      
+      if ('deletePixel' in storage && typeof storage.deletePixel === 'function') {
+        await (storage as any).deletePixel(id);
+        
+        // Broadcast pixel deletion
+        broadcast({
+          type: "pixel_deleted",
+          data: { pixelId: id },
+        });
+        
+        res.json({ success: true });
+      } else {
+        res.status(501).json({ message: "Pixel deletion not supported by current storage" });
+      }
+    } catch (error) {
+      res.status(500).json({ message: "Failed to delete pixel" });
+    }
+  });
+
+  app.delete("/api/admin/canvas", requireAdmin, async (req, res) => {
+    try {
+      if ('clearCanvas' in storage && typeof storage.clearCanvas === 'function') {
+        await (storage as any).clearCanvas();
+        
+        // Broadcast canvas clear
+        broadcast({
+          type: "canvas_cleared",
+          data: {},
+        });
+        
+        res.json({ success: true });
+      } else {
+        res.status(501).json({ message: "Canvas clearing not supported by current storage" });
+      }
+    } catch (error) {
+      res.status(500).json({ message: "Failed to clear canvas" });
+    }
+  });
+
+  app.post("/api/admin/export", requireAdmin, async (req, res) => {
+    try {
+      const filename = await exporter.exportCanvas();
+      res.json({ filename, success: true });
+    } catch (error) {
+      res.status(500).json({ message: "Failed to export canvas" });
+    }
+  });
+
   // Keep connections alive with ping/pong
   const pingInterval = setInterval(() => {
     connectedUsers.forEach(ws => {
diff --git a/server/sqlite-storage.ts b/server/sqlite-storage.ts
new file mode 100644
index 0000000..2ab187b
--- /dev/null
+++ b/server/sqlite-storage.ts
@@ -0,0 +1,220 @@
+import Database from 'better-sqlite3';
+import { type Pixel, type InsertPixel, type CanvasConfig, type InsertCanvasConfig, type UserCooldown, type InsertUserCooldown } from "@shared/schema";
+import { randomUUID } from "crypto";
+import { config } from "./config";
+import { IStorage } from "./storage";
+
+export class SQLiteStorage implements IStorage {
+  private db: Database.Database;
+
+  constructor(dbPath: string = ':memory:') {
+    this.db = new Database(dbPath);
+    this.initTables();
+    this.initDefaultConfig();
+  }
+
+  private initTables() {
+    // Pixels table
+    this.db.exec(`
+      CREATE TABLE IF NOT EXISTS pixels (
+        id TEXT PRIMARY KEY DEFAULT (hex(randomblob(16))),
+        x INTEGER NOT NULL,
+        y INTEGER NOT NULL,
+        color TEXT NOT NULL,
+        userId TEXT NOT NULL,
+        username TEXT NOT NULL,
+        createdAt DATETIME DEFAULT CURRENT_TIMESTAMP
+      )
+    `);
+
+    // Canvas config table
+    this.db.exec(`
+      CREATE TABLE IF NOT EXISTS canvas_config (
+        id TEXT PRIMARY KEY DEFAULT (hex(randomblob(16))),
+        canvasWidth INTEGER NOT NULL DEFAULT 100,
+        canvasHeight INTEGER NOT NULL DEFAULT 100,
+        defaultCooldown INTEGER NOT NULL DEFAULT 5,
+        enableAutomaticEvents BOOLEAN NOT NULL DEFAULT 0,
+        eventDuration INTEGER NOT NULL DEFAULT 30,
+        eventInterval INTEGER NOT NULL DEFAULT 6,
+        updatedAt DATETIME DEFAULT CURRENT_TIMESTAMP
+      )
+    `);
+
+    // User cooldowns table
+    this.db.exec(`
+      CREATE TABLE IF NOT EXISTS user_cooldowns (
+        id TEXT PRIMARY KEY DEFAULT (hex(randomblob(16))),
+        userId TEXT NOT NULL UNIQUE,
+        lastPlacement DATETIME DEFAULT CURRENT_TIMESTAMP,
+        cooldownEnds DATETIME NOT NULL
+      )
+    `);
+
+    // Create indexes
+    this.db.exec(`CREATE INDEX IF NOT EXISTS idx_pixels_xy ON pixels(x, y)`);
+    this.db.exec(`CREATE INDEX IF NOT EXISTS idx_pixels_created ON pixels(createdAt DESC)`);
+    this.db.exec(`CREATE INDEX IF NOT EXISTS idx_cooldowns_user ON user_cooldowns(userId)`);
+  }
+
+  private initDefaultConfig() {
+    const existingConfig = this.db.prepare('SELECT * FROM canvas_config LIMIT 1').get();
+    if (!existingConfig) {
+      this.db.prepare(`
+        INSERT INTO canvas_config (canvasWidth, canvasHeight, defaultCooldown, enableAutomaticEvents, eventDuration, eventInterval)
+        VALUES (?, ?, ?, ?, ?, ?)
+      `).run(
+        config.canvasWidth,
+        config.canvasHeight,
+        config.defaultCooldown,
+        config.enableAutomaticEvents ? 1 : 0,
+        config.eventDurationMinutes,
+        config.eventIntervalHours
+      );
+    }
+  }
+
+  async getPixel(x: number, y: number): Promise<Pixel | undefined> {
+    const row = this.db.prepare('SELECT * FROM pixels WHERE x = ? AND y = ? ORDER BY createdAt DESC LIMIT 1').get(x, y) as any;
+    if (!row) return undefined;
+
+    return {
+      ...row,
+      createdAt: new Date(row.createdAt),
+      enableAutomaticEvents: Boolean(row.enableAutomaticEvents)
+    };
+  }
+
+  async getAllPixels(): Promise<Pixel[]> {
+    const rows = this.db.prepare(`
+      SELECT p1.* FROM pixels p1
+      INNER JOIN (
+        SELECT x, y, MAX(createdAt) as maxCreated
+        FROM pixels 
+        GROUP BY x, y
+      ) p2 ON p1.x = p2.x AND p1.y = p2.y AND p1.createdAt = p2.maxCreated
+    `).all() as any[];
+
+    return rows.map(row => ({
+      ...row,
+      createdAt: new Date(row.createdAt)
+    }));
+  }
+
+  async placePixel(insertPixel: InsertPixel): Promise<Pixel> {
+    const id = randomUUID();
+    const now = new Date();
+
+    this.db.prepare(`
+      INSERT INTO pixels (id, x, y, color, userId, username, createdAt)
+      VALUES (?, ?, ?, ?, ?, ?, ?)
+    `).run(id, insertPixel.x, insertPixel.y, insertPixel.color, insertPixel.userId, insertPixel.username, now.toISOString());
+
+    return {
+      id,
+      ...insertPixel,
+      createdAt: now
+    };
+  }
+
+  async getCanvasConfig(): Promise<CanvasConfig> {
+    const row = this.db.prepare('SELECT * FROM canvas_config ORDER BY updatedAt DESC LIMIT 1').get() as any;
+
+    return {
+      ...row,
+      enableAutomaticEvents: Boolean(row.enableAutomaticEvents),
+      updatedAt: new Date(row.updatedAt)
+    };
+  }
+
+  async updateCanvasConfig(configUpdate: InsertCanvasConfig): Promise<CanvasConfig> {
+    const currentConfig = await this.getCanvasConfig();
+    const now = new Date();
+
+    this.db.prepare(`
+      UPDATE canvas_config 
+      SET canvasWidth = ?, canvasHeight = ?, defaultCooldown = ?, 
+          enableAutomaticEvents = ?, eventDuration = ?, eventInterval = ?, 
+          updatedAt = ?
+      WHERE id = ?
+    `).run(
+      configUpdate.canvasWidth ?? currentConfig.canvasWidth,
+      configUpdate.canvasHeight ?? currentConfig.canvasHeight,
+      configUpdate.defaultCooldown ?? currentConfig.defaultCooldown,
+      configUpdate.enableAutomaticEvents ? 1 : 0,
+      configUpdate.eventDuration ?? currentConfig.eventDuration,
+      configUpdate.eventInterval ?? currentConfig.eventInterval,
+      now.toISOString(),
+      currentConfig.id
+    );
+
+    return this.getCanvasConfig();
+  }
+
+  async getUserCooldown(userId: string): Promise<UserCooldown | undefined> {
+    const row = this.db.prepare('SELECT * FROM user_cooldowns WHERE userId = ?').get(userId) as any;
+    if (!row) return undefined;
+
+    return {
+      ...row,
+      lastPlacement: new Date(row.lastPlacement),
+      cooldownEnds: new Date(row.cooldownEnds)
+    };
+  }
+
+  async setUserCooldown(insertCooldown: InsertUserCooldown): Promise<UserCooldown> {
+    const id = randomUUID();
+    const now = new Date();
+
+    this.db.prepare(`
+      INSERT OR REPLACE INTO user_cooldowns (id, userId, lastPlacement, cooldownEnds)
+      VALUES (?, ?, ?, ?)
+    `).run(id, insertCooldown.userId, now.toISOString(), insertCooldown.cooldownEnds.toISOString());
+
+    return {
+      id,
+      userId: insertCooldown.userId,
+      lastPlacement: now,
+      cooldownEnds: insertCooldown.cooldownEnds
+    };
+  }
+
+  async getRecentPlacements(limit: number = 10): Promise<Pixel[]> {
+    const rows = this.db.prepare(`
+      SELECT * FROM pixels 
+      ORDER BY createdAt DESC 
+      LIMIT ?
+    `).all(limit) as any[];
+
+    return rows.map(row => ({
+      ...row,
+      createdAt: new Date(row.createdAt)
+    }));
+  }
+
+  // Canvas-Erweiterungsmethode
+  async expandCanvas(newWidth: number, newHeight: number): Promise<void> {
+    const currentConfig = await this.getCanvasConfig();
+
+    if (newWidth < currentConfig.canvasWidth || newHeight < currentConfig.canvasHeight) {
+      throw new Error("Canvas kann nur erweitert werden, nicht verkleinert");
+    }
+
+    await this.updateCanvasConfig({
+      canvasWidth: newWidth,
+      canvasHeight: newHeight,
+      defaultCooldown: currentConfig.defaultCooldown,
+      enableAutomaticEvents: currentConfig.enableAutomaticEvents,
+      eventDuration: currentConfig.eventDuration,
+      eventInterval: currentConfig.eventInterval
+    });
+  }
+
+  async deletePixel(pixelId: string): Promise<void> {
+    this.db.prepare("DELETE FROM pixels WHERE id = ?").run(pixelId);
+  }
+
+  async clearCanvas(): Promise<void> {
+    this.db.prepare("DELETE FROM pixels").run();
+  }
+}
\ No newline at end of file
diff --git a/server/storage.ts b/server/storage.ts
index 4884f1a..a842311 100644
--- a/server/storage.ts
+++ b/server/storage.ts
@@ -7,17 +7,21 @@ export interface IStorage {
   getPixel(x: number, y: number): Promise<Pixel | undefined>;
   getAllPixels(): Promise<Pixel[]>;
   placePixel(pixel: InsertPixel): Promise<Pixel>;
-  
+
   // Config operations
   getCanvasConfig(): Promise<CanvasConfig>;
   updateCanvasConfig(config: InsertCanvasConfig): Promise<CanvasConfig>;
-  
+
   // User cooldown operations
   getUserCooldown(userId: string): Promise<UserCooldown | undefined>;
   setUserCooldown(cooldown: InsertUserCooldown): Promise<UserCooldown>;
-  
+
   // Recent activity
   getRecentPlacements(limit?: number): Promise<Pixel[]>;
+
+  // Admin operations
+  deletePixel(pixelId: string): Promise<void>;
+  clearCanvas(): Promise<void>;
 }
 
 export class MemStorage implements IStorage {
@@ -60,7 +64,7 @@ export class MemStorage implements IStorage {
       id,
       createdAt: new Date(),
     };
-    
+
     this.pixels.set(this.getPixelKey(pixel.x, pixel.y), pixel);
     return pixel;
   }
@@ -89,7 +93,7 @@ export class MemStorage implements IStorage {
       id,
       lastPlacement: new Date(),
     };
-    
+
     this.userCooldowns.set(cooldown.userId, cooldown);
     return cooldown;
   }
@@ -100,6 +104,21 @@ export class MemStorage implements IStorage {
       .sort((a, b) => b.createdAt.getTime() - a.createdAt.getTime())
       .slice(0, limit);
   }
+
+  async deletePixel(pixelId: string): Promise<void> {
+    this.pixels.delete(pixelId);
+  }
+
+  async clearCanvas(): Promise<void> {
+    this.pixels.clear();
+  }
 }
 
-export const storage = new MemStorage();
+// The SQLiteStorage import and usage below is not part of the changes,
+// but is included to ensure the file is complete as per instructions.
+import { SQLiteStorage } from "./sqlite-storage";
+
+// Verwende SQLite im Development-Modus, Memory-Storage in Production
+export const storage = process.env.NODE_ENV === 'development'
+  ? new SQLiteStorage('./dev-database.sqlite')
+  : new MemStorage();
\ No newline at end of file
diff --git a/shared/schema.ts b/shared/schema.ts
index d24f2f0..6e8b56b 100644
--- a/shared/schema.ts
+++ b/shared/schema.ts
@@ -83,4 +83,9 @@ export const wsMessageSchema = z.union([
   }),
 ]);
 
-export type WSMessage = z.infer<typeof wsMessageSchema>;
+export type WSMessage =
+  | { type: "pixel_placed"; data: { x: number; y: number; color: string; userId: string; username: string; timestamp: string } }
+  | { type: "user_count"; data: { count: number } }
+  | { type: "cooldown_update"; data: { userId: string; remainingSeconds: number } }
+  | { type: "pixel_deleted"; data: { pixelId: string } }
+  | { type: "canvas_cleared"; data: {} };
\ No newline at end of file