feat: add download toast, e2e permission tests, and update favicons

- Add download toast component with progress indicator and auto-dismiss
- Add download store for managing file download state
- Add e2e tests for permission prompts (allow/deny flows)
- Add global setup for e2e tests with isolated daemon instance
- Update favicon assets with new design
- Refactor agent-stream-view to use shared tool-call-details component
- Simplify file-explorer-pane component
- Clean up unused screenshots and PRODUCTION.md

🤖 Generated with [Claude Code](https://claude.com/claude-code)

packages/app/src/components/git-diff-pane.tsx

@@ -286,6 +286,11 @@ const DiffFileSection = memo(function DiffFileSection({
               <Text style={styles.newBadgeText}>New</Text>
             </View>
           )}
+          {file.isDeleted && (
+            <View style={styles.deletedBadge}>
+              <Text style={styles.deletedBadgeText}>Deleted</Text>
+            </View>
+          )}
         </View>
         <View style={styles.fileHeaderRight}>
           <Text style={styles.additions}>+{file.additions}</Text>
@@ -579,6 +584,18 @@ const styles = StyleSheet.create((theme) => ({
     fontWeight: theme.fontWeight.normal,
     color: theme.colors.palette.green[400],
   },
+  deletedBadge: {
+    backgroundColor: "rgba(248, 81, 73, 0.2)",
+    paddingHorizontal: theme.spacing[2],
+    paddingVertical: theme.spacing[1],
+    borderRadius: theme.borderRadius.md,
+    flexShrink: 0,
+  },
+  deletedBadgeText: {
+    fontSize: theme.fontSize.xs,
+    fontWeight: theme.fontWeight.normal,
+    color: theme.colors.palette.red[500],
+  },
   additions: {
     fontSize: theme.fontSize.sm,
     fontWeight: theme.fontWeight.normal,