feat: install table + echarts, webhook handler for call records

- Install Untitled UI table component
- Install Apache ECharts (echarts + echarts-for-react)
- Build webhook handler: POST /webhooks/ozonetel/missed-call
  - Parses Ozonetel call event payload
  - Creates Call record in platform
  - Matches caller to Lead by phone number
  - Creates LeadActivity on the lead
  - Updates lead contact timestamps
- Fix table component import paths (@/src/ → @/)
- Make seed scripts configurable for remote deployment

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

package.json

@@ -20,6 +20,8 @@
         "@tailwindcss/vite": "^4.1.18",
         "@untitledui/file-icons": "^0.0.8",
         "@untitledui/icons": "^0.0.21",
+        "echarts": "^6.0.0",
+        "echarts-for-react": "^3.0.6",
         "input-otp": "^1.4.2",
         "jotai": "^2.18.1",
         "jssip": "^3.13.6",