feat: apply CodeRabbit's review suggestions

- Remove unused props from BackupSettings component
- Fix config mutation by using useEffect in LLMSettings
- Add block scopes in e2e test switch cases
- Improve parseSessionId error handling for invalid dates
- Add keyboard accessibility to expandable table rows

Author: Y-RyuZU

src/__tests__/e2e/backup-system-e2e.test.ts

@@ -64,7 +64,7 @@ describe('Backup System E2E Tests', () => {
         case 'generate_session_id':
           return sessionId;
 
-        case 'backup_snbt_files':
+        case 'backup_snbt_files': {
           // Simulate SNBT backup
           const backupDir = path.join(args.sessionPath, 'backup', 'snbt_original');
           await fs.mkdir(backupDir, { recursive: true });
@@ -73,15 +73,17 @@ describe('Backup System E2E Tests', () => {
             await fs.writeFile(path.join(backupDir, fileName), 'original content');
           }
           return;
+        }
 
-        case 'backup_resource_pack':
+        case 'backup_resource_pack': {
           // Simulate resource pack backup
           const packBackupDir = path.join(args.sessionPath, 'backup', 'resource_pack');
           await fs.mkdir(packBackupDir, { recursive: true });
           await fs.writeFile(path.join(packBackupDir, 'pack.mcmeta'), '{}');
           return;
+        }
 
-        case 'update_translation_summary':
+        case 'update_translation_summary': {
           // Simulate summary update
           const summaryPath = path.join(logsDir, 'localizer', args.sessionId, 'translation_summary.json');
           await fs.mkdir(path.dirname(summaryPath), { recursive: true });
@@ -101,6 +103,7 @@ describe('Backup System E2E Tests', () => {
 
           await fs.writeFile(summaryPath, JSON.stringify(summary, null, 2));
           return;
+        }
 
         case 'list_translation_sessions':
           // Return mock sessions

src/components/settings/backup-settings.tsx

@@ -3,14 +3,8 @@
 import { useAppTranslation } from "@/lib/i18n";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
 import { HardDrive } from "lucide-react";
-import { type AppConfig } from "@/lib/types/config";
 
-interface BackupSettingsProps {
-  config: AppConfig;
-  setConfig: (config: AppConfig) => void;
-}
-
-export function BackupSettings({ }: BackupSettingsProps) {
+export function BackupSettings() {
   const { t } = useAppTranslation();
 
   return (

src/components/settings/llm-settings.tsx

@@ -21,19 +21,26 @@ export function LLMSettings({ config, setConfig }: LLMSettingsProps) {
   const [showApiKey, setShowApiKey] = useState(false);
 
   // Initialize apiKeys if not present
-  if (!config.llm.apiKeys) {
-    config.llm.apiKeys = {
-      openai: "",
-      anthropic: "",
-      google: ""
-    };
-  }
+  useEffect(() => {
+    if (!config.llm.apiKeys) {
+      const newConfig = { ...config };
+      newConfig.llm = {
+        ...newConfig.llm,
+        apiKeys: {
+          openai: "",
+          anthropic: "",
+          google: ""
+        }
+      };
+      setConfig(newConfig);
+    }
+  }, [config, setConfig]);
 
   // Get current API key based on selected provider
   const getCurrentApiKey = () => {
     const provider = config.llm.provider as keyof typeof config.llm.apiKeys;
     // Use provider-specific key if available, fallback to legacy apiKey
-    return config.llm.apiKeys[provider] || config.llm.apiKey || "";
+    return config.llm.apiKeys?.[provider] || config.llm.apiKey || "";
   };
 
   // Set API key for current provider

src/components/ui/translation-history-dialog.tsx

@@ -65,8 +65,11 @@ const parseSessionId = (id: string): Date => {
   const match = id.match(/(\d{4})-(\d{2})-(\d{2})_(\d{2})-(\d{2})-(\d{2})/);
   if (match) {
     const [, year, month, day, hour, minute, second] = match;
-    return new Date(parseInt(year), parseInt(month) - 1, parseInt(day), parseInt(hour), parseInt(minute), parseInt(second));
+    const parsedDate = new Date(parseInt(year), parseInt(month) - 1, parseInt(day), parseInt(hour), parseInt(minute), parseInt(second));
+    // Return current date if parsing resulted in invalid date
+    return isNaN(parsedDate.getTime()) ? new Date() : parsedDate;
   }
+  // Return current date for invalid format
   return new Date();
 };
 
@@ -202,7 +205,20 @@ function SessionRow({ sessionSummary, onToggle, minecraftDir, updateSession }: {
 
   return (
     <>
-      <TableRow className="cursor-pointer" onClick={onToggle}>
+      <TableRow 
+        className="cursor-pointer hover:bg-muted/50 focus:bg-muted/50 focus:outline-none" 
+        onClick={onToggle}
+        onKeyDown={(e) => {
+          if (e.key === 'Enter' || e.key === ' ') {
+            e.preventDefault();
+            onToggle();
+          }
+        }}
+        tabIndex={0}
+        role="button"
+        aria-expanded={sessionSummary.expanded}
+        aria-label={`${sessionSummary.expanded ? 'Collapse' : 'Expand'} session ${formatSessionId(sessionSummary.sessionId)}`}
+      >
         <TableCell>
           <div className="flex items-center space-x-2">
             {sessionSummary.expanded ? <ChevronDown className="h-4 w-4" /> : <ChevronRight className="h-4 w-4" />}