feat: add Citations and WatchlistChat components, integrate with API

- Implemented Citations component to display citation data.
- Created WatchlistDrawer and ChatSidebar components for managing watchlists and AI chat functionality.
- Integrated API calls for watchlist management and chat interactions.
- Updated index.tsx to include new components in the main application layout.
- Added API client in lib/api.ts for structured API interactions.
- Developed Alerts, Dashboard, Portfolio, Routines, Screener, and Report pages with relevant data fetching and UI components.
- Introduced styles in tokens.css for consistent theming across the application.
- Configured TypeScript and Vite for project setup and development.

backend/tests/fixtures/quarterly_roe.json

@@ -0,0 +1,42 @@
+[
+ {
+  "symbol": "ROE.JK",
+  "date": "2025-09-30",
+  "revenue": 100,
+  "earnings": 100,
+  "total_assets": 2000,
+  "total_equity": 1000,
+  "operating_cash_flow": 50,
+  "total_debt": 100
+ },
+ {
+  "symbol": "ROE.JK",
+  "date": "2025-12-31",
+  "revenue": 105,
+  "earnings": 102,
+  "total_assets": 2200,
+  "total_equity": 1150,
+  "operating_cash_flow": 50,
+  "total_debt": 100
+ },
+ {
+  "symbol": "ROE.JK",
+  "date": "2026-03-31",
+  "revenue": 110,
+  "earnings": 104,
+  "total_assets": 2400,
+  "total_equity": 1300,
+  "operating_cash_flow": 50,
+  "total_debt": 100
+ },
+ {
+  "symbol": "ROE.JK",
+  "date": "2026-06-30",
+  "revenue": 115,
+  "earnings": 105,
+  "total_assets": 2600,
+  "total_equity": 1500,
+  "operating_cash_flow": 50,
+  "total_debt": 100
+ }
+]