chore: Add echarts dependency for analytics dashboard

Installed echarts@5.x for Phase 2 analytics charts.

Frontend build verified: 0 errors
Backend build verified: 0 errors

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

frontend/package-lock.json

@@ -8,6 +8,7 @@
       "name": "frontend",
       "version": "0.0.0",
       "dependencies": {
+        "echarts": "^6.0.0",
         "lucide-vue-next": "^0.564.0",
         "pinia": "^3.0.4",
         "pinia-plugin-persistedstate": "^4.7.1",
@@ -1579,6 +1580,16 @@
         "node": ">=8"
       }
     },
+    "node_modules/echarts": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/echarts/-/echarts-6.0.0.tgz",
+      "integrity": "sha512-Tte/grDQRiETQP4xz3iZWSvoHrkCQtwqd6hs+mifXcjrCuo2iKWbajFObuLJVBlDIJlOzgQPd1hsaKt/3+OMkQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "tslib": "2.3.0",
+        "zrender": "6.0.0"
+      }
+    },
     "node_modules/enhanced-resolve": {
       "version": "5.19.0",
       "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.19.0.tgz",
@@ -2395,6 +2406,12 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
+    "node_modules/tslib": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.3.0.tgz",
+      "integrity": "sha512-N82ooyxVNm6h1riLCoyS9e3fuJ3AMG2zIZs2Gd1ATcSFjSA23Q0fzjjZeh0jbJvWVDZ0cJT8yaNNaaXHzueNjg==",
+      "license": "0BSD"
+    },
     "node_modules/typescript": {
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
@@ -2676,6 +2693,15 @@
       "funding": {
         "url": "https://github.com/sponsors/eemeli"
       }
+    },
+    "node_modules/zrender": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/zrender/-/zrender-6.0.0.tgz",
+      "integrity": "sha512-41dFXEEXuJpNecuUQq6JlbybmnHaqqpGlbH1yxnA5V9MMP4SbohSVZsJIwz+zdjQXSSlR1Vc34EgH1zxyTDvhg==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "tslib": "2.3.0"
+      }
     }
   }
 }

frontend/package.json

@@ -9,6 +9,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "echarts": "^6.0.0",
     "lucide-vue-next": "^0.564.0",
     "pinia": "^3.0.4",
     "pinia-plugin-persistedstate": "^4.7.1",