Add Insiders tab with diverging bar chart and transaction table

- Backend: get_insider_transactions() in data_service (yfinance, 1hr TTL)
- Backend: InsidersResponse schema + GET /api/tickers/{symbol}/insiders
- Frontend: InsidersPage with 4-KPI strip, SVG diverging bar chart (),
  psm-insider transaction rows, pill filter toggles, shimmer skeleton,
  empty/error states
- Enable Insiders nav item (remove disabled flag)

1 files changed, 6 insertions, 1 deletions

diff --git a/backend/app/main.py b/backend/app/main.py
index 7e02cbe..386a695 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -9,7 +9,7 @@ from fastapi import FastAPI, HTTPException, Query, status
 from fastapi.middleware.cors import CORSMiddleware
 
 from app.db import watchlist
-from app.schemas import FinancialsResponse, HistoryPoint, MarketIndex, RatiosResponse, SearchResult, TickerOverview, ValuationResponse, WatchlistResponse
+from app.schemas import FinancialsResponse, HistoryPoint, InsidersResponse, MarketIndex, RatiosResponse, SearchResult, TickerOverview, ValuationResponse, WatchlistResponse
 from app.services import data_service
 
 load_dotenv()
@@ -80,6 +80,11 @@ def ticker_ratios(symbol: str) -> dict:
     return data_service.get_ratios(symbol)
 
 
+@app.get("/api/tickers/{symbol}/insiders", response_model=InsidersResponse)
+def ticker_insiders(symbol: str) -> dict:
+    return data_service.get_insider_transactions(symbol)
+
+
 @app.get("/api/watchlist", response_model=WatchlistResponse)
 def get_watchlist() -> dict:
     items = []