feat: hide business mode toggle in consumer APK, update 4-variant build script

- soul_screen.dart: pass showBusinessMode: isBusinessApp to OtherSettingsSection
  so the toggle is hidden when built with IS_BUSINESS_APP=false
- build_4_apks.sh: rewrite for current strategy (consumer/business x maita/eiji)
  Pro variants removed; set_lite_app_id() restores gradle before each build

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

build_4_apks.sh

@@ -0,0 +1,102 @@
+#!/bin/bash
+# ============================================================================
+# Ponshu Room - 4バリアント一括ビルドスクリプト
+# consumer × {maita, eiji}  +  business × {maita, eiji}
+# Pro版は不要のため含まない
+# ============================================================================
+
+set -e
+
+TIMESTAMP=$(date +%Y-%m-%d_%H-%M-%S)
+OUTPUT_DIR="build/apk_releases/$TIMESTAMP"
+mkdir -p "$OUTPUT_DIR"
+
+# APIキー (.env から読み込む)
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+if [ -f "$SCRIPT_DIR/.env" ]; then
+  export $(grep -v '^#' "$SCRIPT_DIR/.env" | xargs)
+fi
+MAITA_KEY="${MAITA_API_KEY:?MAITA_API_KEY is not set in .env}"
+EIJI_KEY="${EIJI_API_KEY:?EIJI_API_KEY is not set in .env}"
+
+GRADLE_FILE="android/app/build.gradle.kts"
+BACKUP_FILE="android/app/build.gradle.kts.backup"
+cp "$GRADLE_FILE" "$BACKUP_FILE"
+
+cleanup() {
+    if [ -f "$BACKUP_FILE" ]; then
+        cp "$BACKUP_FILE" "$GRADLE_FILE"
+        rm "$BACKUP_FILE"
+        echo "Restored build.gradle.kts"
+    fi
+}
+trap cleanup EXIT
+
+# applicationId を Lite に固定（バックアップから毎回復元して書き換え）
+set_lite_app_id() {
+    cp "$BACKUP_FILE" "$GRADLE_FILE"
+    sed -i 's/applicationId = "com.posimai.ponshu_room"/applicationId = "com.posimai.ponshu_room_lite"/' "$GRADLE_FILE"
+}
+
+echo "============================================================================"
+echo "Ponshu Room - 4 Variant APK Build"
+echo "Output: $OUTPUT_DIR"
+echo "============================================================================"
+echo ""
+
+# --- [1/4] Consumer / Maita ---
+echo "[1/4] Building Consumer - Maita..."
+set_lite_app_id
+flutter build apk --release \
+  --dart-define=GEMINI_API_KEY=$MAITA_KEY \
+  --dart-define=IS_BUSINESS_APP=false \
+  --dart-define=IS_PRO_VERSION=false \
+  --dart-define=USE_PROXY=false
+cp build/app/outputs/flutter-apk/app-release.apk "$OUTPUT_DIR/ponshu_room_consumer_maita.apk"
+echo "Saved: ponshu_room_consumer_maita.apk"
+echo ""
+
+# --- [2/4] Consumer / Eiji ---
+echo "[2/4] Building Consumer - Eiji..."
+set_lite_app_id
+flutter build apk --release \
+  --dart-define=GEMINI_API_KEY=$EIJI_KEY \
+  --dart-define=IS_BUSINESS_APP=false \
+  --dart-define=IS_PRO_VERSION=false \
+  --dart-define=USE_PROXY=false
+cp build/app/outputs/flutter-apk/app-release.apk "$OUTPUT_DIR/ponshu_room_consumer_eiji.apk"
+echo "Saved: ponshu_room_consumer_eiji.apk"
+echo ""
+
+# --- [3/4] Business / Maita ---
+echo "[3/4] Building Business - Maita..."
+set_lite_app_id
+flutter build apk --release \
+  --dart-define=GEMINI_API_KEY=$MAITA_KEY \
+  --dart-define=IS_BUSINESS_APP=true \
+  --dart-define=IS_PRO_VERSION=false \
+  --dart-define=USE_PROXY=false
+cp build/app/outputs/flutter-apk/app-release.apk "$OUTPUT_DIR/ponshu_room_business_maita.apk"
+echo "Saved: ponshu_room_business_maita.apk"
+echo ""
+
+# --- [4/4] Business / Eiji ---
+echo "[4/4] Building Business - Eiji..."
+set_lite_app_id
+flutter build apk --release \
+  --dart-define=GEMINI_API_KEY=$EIJI_KEY \
+  --dart-define=IS_BUSINESS_APP=true \
+  --dart-define=IS_PRO_VERSION=false \
+  --dart-define=USE_PROXY=false
+cp build/app/outputs/flutter-apk/app-release.apk "$OUTPUT_DIR/ponshu_room_business_eiji.apk"
+echo "Saved: ponshu_room_business_eiji.apk"
+echo ""
+
+echo "============================================================================"
+echo "All 4 variants built successfully!"
+echo "============================================================================"
+ls -lh "$OUTPUT_DIR"
+echo ""
+echo "Consumer APKs: IS_BUSINESS_APP=false (ビジネスモードトグル非表示)"
+echo "Business APKs: IS_BUSINESS_APP=true  (デモ・ヒアリング用)"
+echo "============================================================================"

lib/screens/soul_screen.dart

@@ -13,6 +13,7 @@ import '../widgets/gamification/badge_case.dart';
 import '../widgets/gamification/activity_stats.dart'; 
 import '../theme/app_colors.dart';
 import '../services/mbti_types.dart'; // Needed for type title display
+import '../main.dart' show isBusinessApp;
 
 class SoulScreen extends ConsumerStatefulWidget {
   const SoulScreen({super.key});
@@ -127,6 +128,7 @@ class _SoulScreenState extends ConsumerState<SoulScreen> {
           // other Settings
           OtherSettingsSection(
             title: t['otherSettings'],
+            showBusinessMode: isBusinessApp,
           ),
 
           const SizedBox(height: 24),