Add score card, 52W range bar, short interest, options tab, CSV exports

Overview:
- Score card: green/yellow/red signals for valuation, growth, profitability,
  leverage, momentum (vs 52W high), and short interest
- 52W high/low visual range bar with current price marker and % context
- Short interest metrics row: % of float, days to cover, shares short vs
  prior month
- Replaced static 52W High/Low metrics with volume and avg volume

Options tab (new):
- Expiry selector across all available expirations
- Put/call ratio by volume and open interest with bullish/bearish label
- IV smile chart (calls + puts) with ATM marker
- Open interest by strike (calls above, puts mirrored below axis)
- Full chain table (calls/puts) in expandable section

CSV exports:
- Download button on each financial statement (income, balance, cash flow)
- Download button on earnings history table

Also fix top padding cut-off: block-container padding-top 1rem → 3.5rem

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/services/data_service.py b/services/data_service.py
index f0f981b..3de2484 100644
--- a/services/data_service.py
+++ b/services/data_service.py
@@ -158,6 +158,36 @@ def get_insider_transactions(ticker: str) -> pd.DataFrame:
         return pd.DataFrame()
 
 
+@st.cache_data(ttl=900)
+def get_options_chain(ticker: str) -> dict:
+    """Return options chain data for the nearest available expirations.
+
+    Returns:
+        {
+            "expirations": [str, ...],        # all available expiry dates
+            "chains": [
+                {"expiry": str, "calls": DataFrame, "puts": DataFrame},
+                ...
+            ]
+        }
+    """
+    try:
+        t = yf.Ticker(ticker.upper())
+        expirations = t.options
+        if not expirations:
+            return {}
+        chains = []
+        for exp in expirations[:8]:
+            try:
+                chain = t.option_chain(exp)
+                chains.append({"expiry": exp, "calls": chain.calls, "puts": chain.puts})
+            except Exception:
+                pass
+        return {"expirations": list(expirations), "chains": chains}
+    except Exception:
+        return {}
+
+
 @st.cache_data(ttl=3600)
 def get_sec_filings(ticker: str) -> list[dict]:
     """Return SEC filings from yfinance.