diff --git a/.phase37-state.json b/.phase37-state.json
index 8ba451a..cf28e65 100644
--- a/.phase37-state.json
+++ b/.phase37-state.json
@@ -1,8 +1,9 @@
 {
   "completed_features": [],
-  "current_feature": "timeline-component",
+  "current_feature": "skeleton-block-component",
   "started_at": "2026-05-23T10:03:26.504746",
   "attempted_features": [
-    "stepper-component"
+    "stepper-component",
+    "timeline-component"
   ]
 }
\ No newline at end of file
diff --git a/GENERATION_LOG.md b/GENERATION_LOG.md
index d4dde28..6b8c4f9 100644
--- a/GENERATION_LOG.md
+++ b/GENERATION_LOG.md
@@ -3992,3 +3992,21 @@ src/index.ts(27,25): error TS2769: No overload matches this call.
   Overload 1 of 3, '(plugin: FastifyPluginCallback<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>, opts?: FastifyRegisterOptions<...> | undefined): FastifyInstance<...> & PromiseLike<...>', gave the following error.
     Argument of type 'Promise<FastifyMultipartPlugin>' is not assignable to parameter of type 'FastifyPluginCallback<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>'.
       Type 'Promise<FastifyMultipartPlugin>' provides no match for the signature '(instance: FastifyInstance<RawServerDefault, IncomingMessage, ServerResponse<IncomingMessage>, 
+- `10:04:04` **INFO**   Committed feature timeline-component
+- `10:04:05` **INFO**   Pushed: rc=0
+
+## Phase-3 Feature: skeleton-block-component (2026-05-23 10:04:05)
+
+- `10:04:05` **INFO** Description: SkeletonBlock für Loading-Placeholders
+- `10:04:05` **INFO**   Generating apps/web/src/components/SkeletonBlock.tsx (SkeletonBlock-Component. Props: width?, height? (default 'full'/'4'), …)
+- `10:04:14` **INFO**     wrote 862 chars in 8.9s (attempt 1)
+- `10:04:14` **INFO** Running tsc --noEmit on api…
+- `10:04:15` **WARN**   tsc errors:
+src/db/schema.ts(37,14): error TS7022: 'customers' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer.
+src/db/schema.ts(45,59): error TS7024: Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
+src/db/schema.ts(49,14): error TS7022: 'projects' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer.
+src/db/schema.ts(53,56): error TS7024: Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
+src/index.ts(27,25): error TS2769: No overload matches this call.
+  Overload 1 of 3, '(plugin: FastifyPluginCallback<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>, opts?: FastifyRegisterOptions<...> | undefined): FastifyInstance<...> & PromiseLike<...>', gave the following error.
+    Argument of type 'Promise<FastifyMultipartPlugin>' is not assignable to parameter of type 'FastifyPluginCallback<{ limits: { fileSize: number; }; }, RawServerDefault, FastifyTypeProvider, FastifyBaseLogger>'.
+      Type 'Promise<FastifyMultipartPlugin>' provides no match for the signature '(instance: FastifyInstance<RawServerDefault, IncomingMessage, ServerResponse<IncomingMessage>, 
diff --git a/apps/web/src/components/SkeletonBlock.tsx b/apps/web/src/components/SkeletonBlock.tsx
new file mode 100644
index 0000000..20fde95
--- /dev/null
+++ b/apps/web/src/components/SkeletonBlock.tsx
@@ -0,0 +1,38 @@
+import React from 'react';
+
+interface SkeletonBlockProps {
+  width?: 'full' | 'auto' | string;
+  height?: 'full' | 'auto' | string;
+  rounded?: 'none' | 'sm' | 'md' | 'full';
+}
+
+const SkeletonBlock: React.FC<SkeletonBlockProps> = ({
+  width = 'full',
+  height = '4',
+  rounded = 'md',
+}) => {
+  const widthClass = width === 'full' ? 'w-full' : width === 'auto' ? 'w-auto' : `w-[${width}]`;
+  const heightClass = height === 'full' ? 'h-full' : height === 'auto' ? 'h-auto' : `h-[${height}]`;
+  
+  const roundedMap = {
+    none: 'rounded-none',
+    sm: 'rounded-sm',
+    md: 'rounded-md',
+    full: 'rounded-full',
+  };
+
+  return (
+    <div 
+      className={`
+        ${widthClass} 
+        ${heightClass} 
+        ${roundedMap[rounded]} 
+        bg-zinc-200 
+        dark:bg-zinc-700 
+        animate-pulse
+      `} 
+    />
+  );
+};
+
+export default SkeletonBlock;
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