feat(WEB): FCM 푸시 알림 시스템 구현

- FCMProvider 컨텍스트 및 useFCM 훅 추가
- Capacitor FCM 플러그인 통합
- 알림 사운드 파일 추가 (default.wav, push_notification.wav)
- Firebase 메시징 패키지 의존성 추가

package-lock.json

@@ -8,6 +8,9 @@
       "name": "sma-next-project",
       "version": "0.1.0",
       "dependencies": {
+        "@capacitor/app": "^8.0.0",
+        "@capacitor/core": "^8.0.0",
+        "@capacitor/push-notifications": "^8.0.0",
         "@hookform/resolvers": "^5.2.2",
         "@radix-ui/react-alert-dialog": "^1.1.15",
         "@radix-ui/react-checkbox": "^1.3.3",
@@ -77,6 +80,33 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/@capacitor/app": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/@capacitor/app/-/app-8.0.0.tgz",
+      "integrity": "sha512-OwzIkUs4w433Bu9WWAEbEYngXEfJXZ9Wmdb8eoaqzYBgB0W9/3Ed/mh6sAYPNBAZlpyarmewgP7Nb+d3Vrh+xA==",
+      "license": "MIT",
+      "peerDependencies": {
+        "@capacitor/core": ">=8.0.0"
+      }
+    },
+    "node_modules/@capacitor/core": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/@capacitor/core/-/core-8.0.0.tgz",
+      "integrity": "sha512-250HTVd/W/KdMygoqaedisvNbHbpbQTN2Hy/8ZYGm1nAqE0Fx7sGss4l0nDg33STxEdDhtVRoL2fIaaiukKseA==",
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "^2.1.0"
+      }
+    },
+    "node_modules/@capacitor/push-notifications": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/@capacitor/push-notifications/-/push-notifications-8.0.0.tgz",
+      "integrity": "sha512-xJWQLqAfC8b2ETqAPmwDnkKB4t/lVrbYc2D8VpA2fSu10JFSL/R722Vk0Lfl9Lo9WusmyIiQbVfILNQ3iFNGKw==",
+      "license": "MIT",
+      "peerDependencies": {
+        "@capacitor/core": ">=8.0.0"
+      }
+    },
     "node_modules/@date-fns/tz": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/@date-fns/tz/-/tz-1.4.1.tgz",