fix: custom tickers now placed in their natural asset-class tab

- Detect yfinance quote_type (CURRENCY→forex, FUTURE→energy, INDEX→indices,
  ETF→etfs, EQUITY→equities) when adding a custom ticker and persist it in
  market_watchlist.asset_class
- get_all_quotes() merges custom tickers into their proper group (e.g. EURUSD=X
  appears under Forex) instead of always under a separate "Custom" group
- "Custom" tab only shows tickers whose type couldn't be detected
- Add market_watchlist.asset_class migration; ensure backtest_lab_runs and
  market_watchlist are always created at init_db() time

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

backend/routers/market_data.py

@@ -45,6 +45,16 @@ def list_custom_tickers():
     return get_market_custom_tickers()
 
 
+_QUOTE_TYPE_TO_ASSET_CLASS = {
+    "CURRENCY": "forex",
+    "FUTURE": "energy",
+    "INDEX": "indices",
+    "ETF": "etfs",
+    "EQUITY": "equities",
+    "MUTUALFUND": "etfs",
+}
+
+
 @router.post("/custom-tickers/{ticker}")
 def add_custom_ticker(ticker: str):
     from services.data_fetcher import get_quote
@@ -55,13 +65,17 @@ def add_custom_ticker(ticker: str):
     if not q or not q.get("price"):
         from fastapi import HTTPException
         raise HTTPException(400, f"Ticker '{ticker}' not found on yfinance")
+    name = ticker
+    asset_class = "custom"
     try:
         info = yf.Ticker(ticker).fast_info
         name = getattr(info, "long_name", None) or getattr(info, "short_name", None) or ticker
+        quote_type = getattr(info, "quote_type", "") or ""
+        asset_class = _QUOTE_TYPE_TO_ASSET_CLASS.get(quote_type.upper(), "custom")
     except Exception:
-        name = ticker
-    add_market_custom_ticker(ticker, name)
-    return {"ticker": ticker, "name": name, "price": q["price"]}
+        pass
+    add_market_custom_ticker(ticker, name, asset_class)
+    return {"ticker": ticker, "name": name, "asset_class": asset_class, "price": q["price"]}
 
 
 @router.delete("/custom-tickers/{ticker}")

backend/services/data_fetcher.py

@@ -137,20 +137,23 @@ def get_all_quotes() -> Dict[str, List[Dict[str, Any]]]:
                 quotes.append(q)
         result[asset_class] = quotes
 
-    # User-added custom tickers
+    # User-added custom tickers — placed in their detected asset class group
     try:
         from services.database import get_market_custom_tickers
         custom_entries = get_market_custom_tickers()
-        if custom_entries:
-            custom_quotes = []
-            for entry in custom_entries:
-                q = get_quote(entry["ticker"])
-                if q:
-                    q["name"] = entry["name"] or entry["ticker"]
-                    q["asset_class"] = "custom"
-                    custom_quotes.append(q)
-            if custom_quotes:
-                result["custom"] = custom_quotes
+        for entry in (custom_entries or []):
+            q = get_quote(entry["ticker"])
+            if not q:
+                continue
+            q["name"] = entry["name"] or entry["ticker"]
+            grp = entry.get("asset_class") or "custom"
+            q["asset_class"] = grp
+            if grp not in result:
+                result[grp] = []
+            # avoid duplicates (ticker already in built-in group)
+            existing_symbols = {x["symbol"] for x in result[grp]}
+            if q["symbol"] not in existing_symbols:
+                result[grp].append(q)
     except Exception:
         pass
 

backend/services/database.py

@@ -97,6 +97,7 @@ def init_db():
             name TEXT,
             added_at TEXT DEFAULT (datetime('now'))
         )""",
+        "ALTER TABLE market_watchlist ADD COLUMN asset_class TEXT DEFAULT 'custom'",
     ]:
         try:
             c.execute(_sql)
@@ -2318,18 +2319,18 @@ def remove_watchlist_ticker(ticker: str) -> bool:
 def get_market_custom_tickers() -> List[Dict]:
     conn = get_conn()
     rows = conn.execute(
-        "SELECT ticker, name, added_at FROM market_watchlist ORDER BY added_at ASC"
+        "SELECT ticker, name, asset_class, added_at FROM market_watchlist ORDER BY added_at ASC"
     ).fetchall()
     conn.close()
     return [dict(r) for r in rows]
 
 
-def add_market_custom_ticker(ticker: str, name: str = "") -> bool:
+def add_market_custom_ticker(ticker: str, name: str = "", asset_class: str = "custom") -> bool:
     conn = get_conn()
     try:
         conn.execute(
-            "INSERT OR IGNORE INTO market_watchlist (ticker, name) VALUES (?, ?)",
-            (ticker.upper(), name),
+            "INSERT OR IGNORE INTO market_watchlist (ticker, name, asset_class) VALUES (?, ?, ?)",
+            (ticker.upper(), name, asset_class),
         )
         inserted = conn.total_changes > 0
         conn.commit()