feat: Complete analytics admin UI panel

- Analytics toggle (enable/disable)
- Event count display
- Export JSON button (copies to clipboard)
- Export CSV button (copies to clipboard)
- Clear data button with confirmation dialog
- Persist analytics enabled state in DataStore

app/src/main/kotlin/farm/hobbs/kioskbrowser/AdminActivity.kt

@@ -1,14 +1,21 @@
 package farm.hobbs.kioskbrowser
 
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
 import android.os.Bundle
 import android.widget.Toast
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
+import androidx.datastore.preferences.core.booleanPreferencesKey
 import androidx.datastore.preferences.core.edit
 import androidx.datastore.preferences.core.stringPreferencesKey
 import farm.hobbs.kioskbrowser.analytics.AnalyticsManager
 import farm.hobbs.kioskbrowser.databinding.ActivityAdminBinding
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import android.text.InputType
 import android.widget.EditText
@@ -69,6 +76,7 @@ class AdminActivity : AppCompatActivity() {
         setContentView(binding.root)
 
         loadCurrentSettings()
+        setupAnalyticsUI()
 
         binding.btnSave.setOnClickListener {
             saveSettings()
@@ -83,6 +91,69 @@ class AdminActivity : AppCompatActivity() {
             finishAffinity()
         }
     }
+    
+    private fun setupAnalyticsUI() {
+        // Load current analytics state
+        updateAnalyticsStats()
+        
+        // Analytics toggle
+        binding.switchAnalytics.isChecked = analytics.enabled
+        binding.switchAnalytics.setOnCheckedChangeListener { _, isChecked ->
+            analytics.enabled = isChecked
+            CoroutineScope(Dispatchers.IO).launch {
+                dataStore.edit { prefs ->
+                    prefs[booleanPreferencesKey("analytics_enabled")] = isChecked
+                }
+            }
+        }
+        
+        // Export JSON
+        binding.btnExportJson.setOnClickListener {
+            CoroutineScope(Dispatchers.Main).launch {
+                val json = analytics.exportToJson()
+                copyToClipboard("Analytics JSON", json)
+                Toast.makeText(this@AdminActivity, "JSON copied to clipboard", Toast.LENGTH_SHORT).show()
+            }
+        }
+        
+        // Export CSV
+        binding.btnExportCsv.setOnClickListener {
+            CoroutineScope(Dispatchers.Main).launch {
+                val csv = analytics.exportToCsv()
+                copyToClipboard("Analytics CSV", csv)
+                Toast.makeText(this@AdminActivity, "CSV copied to clipboard", Toast.LENGTH_SHORT).show()
+            }
+        }
+        
+        // Clear analytics
+        binding.btnClearAnalytics.setOnClickListener {
+            AlertDialog.Builder(this)
+                .setTitle("Clear Analytics")
+                .setMessage("Delete all analytics data? This cannot be undone.")
+                .setPositiveButton("Delete") { _, _ ->
+                    CoroutineScope(Dispatchers.Main).launch {
+                        val count = analytics.clearAll()
+                        Toast.makeText(this@AdminActivity, "Deleted $count events", Toast.LENGTH_SHORT).show()
+                        updateAnalyticsStats()
+                    }
+                }
+                .setNegativeButton("Cancel", null)
+                .show()
+        }
+    }
+    
+    private fun updateAnalyticsStats() {
+        CoroutineScope(Dispatchers.Main).launch {
+            val count = analytics.getEventCount()
+            binding.tvAnalyticsStats.text = "Events: $count"
+        }
+    }
+    
+    private fun copyToClipboard(label: String, text: String) {
+        val clipboard = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+        val clip = ClipData.newPlainText(label, text)
+        clipboard.setPrimaryClip(clip)
+    }
 
     private fun loadCurrentSettings() {
         runBlocking {

app/src/main/res/layout/activity_admin.xml

@@ -69,6 +69,65 @@
                 android:inputType="numberPassword" />
         </com.google.android.material.textfield.TextInputLayout>
 
+        <!-- Usage Analytics Section -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Usage Analytics"
+            android:textSize="18sp"
+            android:textStyle="bold"
+            android:layout_marginTop="16dp"
+            android:layout_marginBottom="8dp" />
+
+        <com.google.android.material.switchmaterial.SwitchMaterial
+            android:id="@+id/switchAnalytics"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Enable Analytics"
+            android:checked="true"
+            android:layout_marginBottom="8dp" />
+
+        <TextView
+            android:id="@+id/tvAnalyticsStats"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Events: 0"
+            android:textColor="#666666"
+            android:layout_marginBottom="12dp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:layout_marginBottom="8dp">
+
+            <Button
+                android:id="@+id/btnExportJson"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:layout_marginEnd="4dp"
+                android:text="Export JSON"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton" />
+
+            <Button
+                android:id="@+id/btnExportCsv"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:layout_marginStart="4dp"
+                android:text="Export CSV"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton" />
+        </LinearLayout>
+
+        <Button
+            android:id="@+id/btnClearAnalytics"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Clear Analytics Data"
+            android:backgroundTint="#FF5722"
+            android:layout_marginBottom="24dp" />
+
         <!-- Digital Signage Section -->
         <TextView
             android:layout_width="wrap_content"