ems-core v1.0.0: Standard EMS platform core

Shared backend + frontend for multi-customer EMS deployments.
- 12 enterprise modules: quota, cost, charging, maintenance, analysis, etc.
- 120+ API endpoints, 37 database tables
- Customer config mechanism (CUSTOMER env var + YAML config)
- Collectors: Modbus TCP, MQTT, HTTP API, Sungrow iSolarCloud
- Frontend: React 19 + Ant Design + ECharts + Three.js
- Infrastructure: Redis cache, rate limiting, aggregation engine

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/public/devices/sensor.svg

@@ -0,0 +1,39 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="400" height="300" viewBox="0 0 400 300">
+  <defs>
+    <linearGradient id="bg" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#1a2332;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#0c1524;stop-opacity:1" />
+    </linearGradient>
+    <radialGradient id="glow" cx="50%" cy="50%" r="50%">
+      <stop offset="0%" style="stop-color:#3b82f6;stop-opacity:0.3" />
+      <stop offset="100%" style="stop-color:#3b82f6;stop-opacity:0" />
+    </radialGradient>
+  </defs>
+  <rect width="400" height="300" fill="url(#bg)" rx="12"/>
+  <!-- Glow effect -->
+  <circle cx="200" cy="130" r="80" fill="url(#glow)"/>
+  <!-- Sensor body -->
+  <rect x="160" y="60" width="80" height="120" rx="12" fill="#f9fafb" stroke="#e5e7eb" stroke-width="2"/>
+  <!-- Display -->
+  <rect x="172" y="75" width="56" height="35" rx="4" fill="#1f2937"/>
+  <text x="200" y="96" text-anchor="middle" fill="#22c55e" font-family="monospace" font-size="18" font-weight="bold">23.5</text>
+  <text x="200" y="106" text-anchor="middle" fill="#6b7280" font-family="monospace" font-size="8">°C</text>
+  <!-- Humidity bar -->
+  <rect x="175" y="120" width="50" height="6" rx="3" fill="#1f2937"/>
+  <rect x="175" y="120" width="32" height="6" rx="3" fill="#3b82f6"/>
+  <text x="200" y="138" text-anchor="middle" fill="#6b7280" font-family="Arial" font-size="9">湿度 64%</text>
+  <!-- Antenna -->
+  <line x1="200" y1="60" x2="200" y2="30" stroke="#9ca3af" stroke-width="2"/>
+  <circle cx="200" cy="26" r="4" fill="#22c55e"/>
+  <!-- Signal waves -->
+  <path d="M 210 35 Q 218 26, 210 17" fill="none" stroke="#22c55e" stroke-width="1.5" opacity="0.6"/>
+  <path d="M 214 39 Q 226 26, 214 13" fill="none" stroke="#22c55e" stroke-width="1.5" opacity="0.4"/>
+  <path d="M 218 43 Q 234 26, 218 9" fill="none" stroke="#22c55e" stroke-width="1.5" opacity="0.2"/>
+  <!-- Wall mount -->
+  <rect x="185" y="180" width="30" height="20" rx="4" fill="#d1d5db"/>
+  <circle cx="195" cy="190" r="3" fill="#9ca3af"/>
+  <circle cx="205" cy="190" r="3" fill="#9ca3af"/>
+  <!-- Label -->
+  <text x="200" y="238" text-anchor="middle" fill="#a78bfa" font-family="Arial, sans-serif" font-size="20" font-weight="bold">温湿度传感器</text>
+  <text x="200" y="258" text-anchor="middle" fill="#6b7280" font-family="Arial, sans-serif" font-size="12">Temperature &amp; Humidity Sensor</text>
+</svg>