feat(back-to-top-component): BackToTop floating button [tsc:fail]

.phase44-state.json

@@ -1,5 +1,8 @@
 {
   "completed_features": [],
-  "current_feature": "drawer-component",
+  "current_feature": "back-to-top-component",
-  "started_at": "2026-05-23T10:38:25.570852"
+  "started_at": "2026-05-23T10:38:25.570852",
+  "attempted_features": [
+    "drawer-component"
+  ]
 }

GENERATION_LOG.md

@@ -4527,3 +4527,21 @@ 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>, 
+- `10:38:38` **INFO**   Committed feature drawer-component
+- `10:38:39` **INFO**   Pushed: rc=0
+
+## Phase-3 Feature: back-to-top-component (2026-05-23 10:38:39)
+
+- `10:38:39` **INFO** Description: BackToTop floating button
+- `10:38:39` **INFO**   Generating apps/web/src/components/BackToTop.tsx (BackToTop-Component. useState visible. Listen auf scroll, zeigt sich w…)
+- `10:38:46` **INFO**     wrote 987 chars in 7.2s (attempt 1)
+- `10:38:46` **INFO** Running tsc --noEmit on api…
+- `10:38:48` **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>, 

apps/web/src/components/BackToTop.tsx

@@ -0,0 +1,40 @@
+import React, { useState, useEffect } from 'react';
+import { ChevronUp } from 'lucide-react';
+
+const BackToTop: React.FC = () => {
+  const [isVisible, setIsVisible] = useState(false);
+
+  useEffect(() => {
+    const toggleVisibility = () => {
+      if (window.scrollY > 300) {
+        setIsVisible(true);
+      } else {
+        setIsVisible(false);
+      }
+    };
+
+    window.addEventListener('scroll', toggleVisibility);
+    return () => window.removeEventListener('scroll', toggleVisibility);
+  }, []);
+
+  const scrollToTop = () => {
+    window.scrollTo({
+      top: 0,
+      behavior: 'smooth',
+    });
+  };
+
+  if (!isVisible) return null;
+
+  return (
+    <button
+      onClick={scrollToTop}
+      className="fixed bottom-6 right-6 p-3 bg-primary text-primary-foreground rounded-full shadow-lg transition-all duration-300 hover:scale-110 active:scale-95 z-50"
+      aria-label="Back to top"
+    >
+      <ChevronUp className="w-6 h-6" />
+    </button>
+  );
+};
+
+export default BackToTop;