diff --git a/Dockerfile b/Dockerfile
index e727491..e57d2f7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,8 +24,8 @@ WORKDIR /app/frontend
 # Copy package files
 COPY frontend/package*.json ./
 
-# Install dependencies
-RUN npm ci --only=production
+# Install dependencies (including dev dependencies for build)
+RUN npm ci
 
 # Copy source code
 COPY frontend/ ./
diff --git a/frontend/src/components/CounterDetail.tsx b/frontend/src/components/CounterDetail.tsx
index 03cca99..ac47b55 100644
--- a/frontend/src/components/CounterDetail.tsx
+++ b/frontend/src/components/CounterDetail.tsx
@@ -1,10 +1,10 @@
-import React, { useState, useEffect } from 'react';
+import React, { useState, useEffect, useCallback } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { useCounters } from '../hooks/useCounters';
 import { useAuth } from '../hooks/useAuth';
 import { CounterWithStats, CounterEntry } from '../types';
 import { countersAPI } from '../services/api';
-import { ArrowLeft, Plus, Minus, Edit, Trash2, Calendar, TrendingUp } from 'lucide-react';
+import { ArrowLeft, Plus, Minus, Trash2, Calendar } from 'lucide-react';
 import { format } from 'date-fns';
 
 export const CounterDetail: React.FC = () => {
@@ -19,13 +19,7 @@ export const CounterDetail: React.FC = () => {
   const [isIncrementing, setIsIncrementing] = useState(false);
   const [error, setError] = useState<string | null>(null);
 
-  useEffect(() => {
-    if (id) {
-      loadCounterData();
-    }
-  }, [id]);
-
-  const loadCounterData = async () => {
+  const loadCounterData = useCallback(async () => {
     if (!id) return;
     
     setIsLoading(true);
@@ -95,7 +89,13 @@ export const CounterDetail: React.FC = () => {
     } finally {
       setIsLoading(false);
     }
-  };
+  }, [id, isAuthenticated]);
+
+  useEffect(() => {
+    if (id) {
+      loadCounterData();
+    }
+  }, [id, loadCounterData]);
 
   const handleIncrement = async (value: number) => {
     if (!counter) return;
diff --git a/frontend/src/components/Dashboard.tsx b/frontend/src/components/Dashboard.tsx
index 01bf439..2be3583 100644
--- a/frontend/src/components/Dashboard.tsx
+++ b/frontend/src/components/Dashboard.tsx
@@ -1,5 +1,4 @@
 import React, { useState } from 'react';
-import { Link } from 'react-router-dom';
 import { useCounters } from '../hooks/useCounters';
 import { useAuth } from '../hooks/useAuth';
 import { CreateCounterModal } from './CreateCounterModal';