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/routes/plugins.py

@@ -0,0 +1,98 @@
+"""
+Plugin Management Endpoints
+"""
+
+from datetime import datetime
+from typing import Literal
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+
+router = APIRouter()
+
+PluginCategory = Literal["INPUT", "BRAIN", "OUTPUT", "ACTION", "DATA", "UI"]
+
+
+class Plugin(BaseModel):
+    id: str
+    name: str
+    version: str
+    category: PluginCategory
+    enabled: bool
+    description: str | None = None
+
+
+class PluginHealth(BaseModel):
+    plugin_id: str
+    status: Literal["healthy", "unhealthy", "unknown"]
+    last_check: datetime
+    error: str | None = None
+
+
+# Mock data
+MOCK_PLUGINS: list[Plugin] = [
+    Plugin(
+        id="lewooogo-input-webhook",
+        name="Webhook Trigger",
+        version="0.1.0",
+        category="INPUT",
+        enabled=True,
+        description="HTTP Webhook 觸發器",
+    ),
+    Plugin(
+        id="lewooogo-brain-llm-router",
+        name="LLM Router",
+        version="0.1.0",
+        category="BRAIN",
+        enabled=True,
+        description="多模型路由器",
+    ),
+    Plugin(
+        id="lewooogo-output-telegram",
+        name="Telegram Notifier",
+        version="0.1.0",
+        category="OUTPUT",
+        enabled=True,
+        description="Telegram 通知",
+    ),
+]
+
+
+@router.get("", response_model=list[Plugin])
+async def list_plugins(
+    category: PluginCategory | None = None,
+    enabled: bool | None = None,
+) -> list[Plugin]:
+    """列出所有已註冊 Plugin"""
+    result = MOCK_PLUGINS
+
+    if category:
+        result = [p for p in result if p.category == category]
+    if enabled is not None:
+        result = [p for p in result if p.enabled == enabled]
+
+    return result
+
+
+@router.get("/{plugin_id}", response_model=Plugin)
+async def get_plugin(plugin_id: str) -> Plugin:
+    """取得 Plugin 詳情"""
+    for plugin in MOCK_PLUGINS:
+        if plugin.id == plugin_id:
+            return plugin
+    raise HTTPException(status_code=404, detail="Plugin not found")
+
+
+@router.get("/{plugin_id}/health", response_model=PluginHealth)
+async def get_plugin_health(plugin_id: str) -> PluginHealth:
+    """Plugin 健康檢查"""
+    # Check if plugin exists
+    found = any(p.id == plugin_id for p in MOCK_PLUGINS)
+    if not found:
+        raise HTTPException(status_code=404, detail="Plugin not found")
+
+    return PluginHealth(
+        plugin_id=plugin_id,
+        status="healthy",
+        last_check=datetime.utcnow(),
+    )