feat: add all application source code

- apps/api: FastAPI backend with Dockerfile
- apps/web: Next.js frontend with Dockerfile
- apps/sensor: Signal collection agent
- packages: shared packages

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

apps/api/src/services/notifications/base.py

@@ -0,0 +1,163 @@
+"""
+Notification Provider Base Interface
+=====================================
+Phase 6: leWOOOgo Output Plugins
+
+設計原則:
+1. 抽象介面 - 所有 Provider 必須實作 send()
+2. 統一訊息格式 - NotificationMessage
+3. 結果追蹤 - NotificationResult
+"""
+
+from abc import ABC, abstractmethod
+from dataclasses import dataclass, field
+from datetime import datetime, timezone
+from enum import Enum
+from typing import Any
+
+
+class NotificationStatus(str, Enum):
+    """通知狀態"""
+    SUCCESS = "success"
+    FAILED = "failed"
+    SKIPPED = "skipped"
+
+
+class ExecutionStatus(str, Enum):
+    """執行狀態"""
+    SUCCESS = "success"
+    FAILED = "failed"
+    DRY_RUN_BLOCKED = "dry_run_blocked"
+    PENDING = "pending"
+
+
+@dataclass
+class NotificationMessage:
+    """
+    通知訊息統一格式
+
+    所有 Provider 都從這個格式轉換成各自的 API 格式
+    """
+    # 執行結果
+    execution_status: ExecutionStatus
+
+    # 核心資訊
+    action_title: str
+    action_description: str
+    approval_id: str
+
+    # 簽核資訊
+    signers: list[dict[str, str]] = field(default_factory=list)  # [{"name": "CTO", "comment": "..."}]
+    required_signatures: int = 1
+
+    # 影響範圍 (Blast Radius)
+    affected_pods: int = 0
+    estimated_downtime: str = "N/A"
+    related_services: list[str] = field(default_factory=list)
+    data_impact: str = "none"
+
+    # 執行細節
+    namespace: str = "default"
+    operation_type: str = "unknown"
+    duration_ms: int | None = None
+    error_message: str | None = None
+
+    # AI 分析
+    risk_level: str = "medium"
+    ai_provider: str = "unknown"
+    confidence: float | None = None
+
+    # 時間戳
+    timestamp: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
+
+    @property
+    def status_emoji(self) -> str:
+        """狀態 Emoji"""
+        if self.execution_status == ExecutionStatus.SUCCESS:
+            return "✅"
+        elif self.execution_status == ExecutionStatus.FAILED:
+            return "❌"
+        elif self.execution_status == ExecutionStatus.DRY_RUN_BLOCKED:
+            return "🛡️"
+        return "⏳"
+
+    @property
+    def status_text(self) -> str:
+        """狀態文字"""
+        if self.execution_status == ExecutionStatus.SUCCESS:
+            return "任務執行成功"
+        elif self.execution_status == ExecutionStatus.FAILED:
+            return "執行失敗"
+        elif self.execution_status == ExecutionStatus.DRY_RUN_BLOCKED:
+            return "Dry-Run 攔截"
+        return "等待中"
+
+    @property
+    def risk_emoji(self) -> str:
+        """風險等級 Emoji"""
+        if self.risk_level == "critical":
+            return "🔴"
+        elif self.risk_level == "medium":
+            return "🟡"
+        return "🟢"
+
+    @property
+    def signers_display(self) -> str:
+        """簽核者顯示文字"""
+        if not self.signers:
+            return "無"
+        return ", ".join([s.get("name", "Unknown") for s in self.signers])
+
+
+@dataclass
+class NotificationResult:
+    """通知發送結果"""
+    status: NotificationStatus
+    provider: str
+    message: str
+    response_data: dict[str, Any] | None = None
+    error: str | None = None
+    timestamp: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
+
+
+class NotificationProvider(ABC):
+    """
+    通知提供者抽象介面
+
+    所有 Output Plugin 必須實作此介面
+    """
+
+    @property
+    @abstractmethod
+    def name(self) -> str:
+        """Provider 名稱"""
+        pass
+
+    @property
+    @abstractmethod
+    def enabled(self) -> bool:
+        """是否啟用"""
+        pass
+
+    @abstractmethod
+    async def send(self, message: NotificationMessage) -> NotificationResult:
+        """
+        發送通知
+
+        Args:
+            message: 統一格式的通知訊息
+
+        Returns:
+            NotificationResult: 發送結果
+        """
+        pass
+
+    @abstractmethod
+    async def test_connection(self) -> bool:
+        """
+        測試連線
+
+        Returns:
+            bool: 是否連線成功
+        """
+        pass