feat: add per-stock weekly price change column to portfolio table

invest/services.py

@@ -16,12 +16,15 @@ from .models import Portfolio, Stock, PortfolioSnapshot
 logger = logging.getLogger(__name__)
 
 # ---------------------------------------------------------------------------
-# In-process price cache (5 min TTL)
+# In-process price cache (5 min TTL) + last-week price cache (1 hour TTL)
 # ---------------------------------------------------------------------------
 
 _price_cache: dict[str, tuple[float, datetime]] = {}
 _PRICE_CACHE_TTL_SECONDS = 300
 
+_last_week_price_cache: dict[str, tuple[Optional[float], datetime]] = {}
+_LAST_WEEK_CACHE_TTL_SECONDS = 3600
+
 
 def _get_yfinance_price(stock_code: str) -> Optional[float]:
     try:
@@ -36,6 +39,30 @@ def _get_yfinance_price(stock_code: str) -> Optional[float]:
         return None
 
 
+def _get_last_week_price(stock_code: str) -> Optional[float]:
+    """Return the closing price ~7 calendar days ago (first available trading day in that window)."""
+    now = datetime.now()
+    cached = _last_week_price_cache.get(stock_code)
+    if cached:
+        price, cached_at = cached
+        if (now - cached_at).total_seconds() < _LAST_WEEK_CACHE_TTL_SECONDS:
+            return price
+
+    try:
+        import yfinance as yf
+        import datetime as dt
+        end = dt.date.today() - dt.timedelta(days=5)
+        start = end - dt.timedelta(days=5)
+        hist = yf.Ticker(stock_code).history(start=start.isoformat(), end=end.isoformat())
+        price = float(hist["Close"].iloc[-1]) if not hist.empty else None
+    except Exception as exc:
+        logger.warning("yfinance last-week price failed for %s: %s", stock_code, exc)
+        price = None
+
+    _last_week_price_cache[stock_code] = (price, now)
+    return price
+
+
 def get_current_price(stock_code: str) -> Optional[float]:
     now = datetime.now()
     cached = _price_cache.get(stock_code)
@@ -58,18 +85,29 @@ def get_current_price(stock_code: str) -> Optional[float]:
 # ---------------------------------------------------------------------------
 
 def get_portfolio_value(portfolio: Portfolio) -> dict:
-    """Return live holdings with current prices and total value."""
+    """Return live holdings with current prices, total value, and weekly price change per stock."""
     holdings = []
     total_value = Decimal('0')
 
     for stock in portfolio.stocks.filter(quantity__gt=0):
         price = get_current_price(stock.stock_code) or 0.0
         value = Decimal(str(price)) * stock.quantity
+        last_week_price = _get_last_week_price(stock.stock_code)
+
+        price_change = None
+        price_change_pct = None
+        if price and last_week_price and last_week_price > 0:
+            price_change = round(price - last_week_price, 4)
+            price_change_pct = round((price_change / last_week_price) * 100, 2)
+
         holdings.append({
             'stock_code': stock.stock_code,
             'quantity': float(stock.quantity),
             'current_price': price,
             'current_value': float(value),
+            'last_week_price': last_week_price,
+            'price_change': price_change,
+            'price_change_pct': price_change_pct,
         })
         total_value += value
 

invest/templates/invest/dashboard.html

@@ -126,6 +126,7 @@
                     <th class="px-6 py-3 text-left">Ticker</th>
                     <th class="px-6 py-3 text-right">Qty</th>
                     <th class="px-6 py-3 text-right">Price</th>
+                    <th class="px-6 py-3 text-right">Week</th>
                     <th class="px-6 py-3 text-right">Mkt Value</th>
                 </tr>
             </thead>
@@ -141,6 +142,15 @@
                     <td class="px-6 py-3 text-right text-stone-500">
                         {% if stock.current_price %}${{ stock.current_price|floatformat:2 }}{% else %}<span class="text-stone-300">—</span>{% endif %}
                     </td>
+                    <td class="px-6 py-3 text-right">
+                        {% if stock.price_change is not None %}
+                            <span class="text-xs font-medium {% if stock.price_change >= 0 %}text-green-700{% else %}text-red-600{% endif %}">
+                                {% if stock.price_change >= 0 %}+{% endif %}{{ stock.price_change_pct|floatformat:1 }}%
+                            </span>
+                        {% else %}
+                            <span class="text-stone-300">—</span>
+                        {% endif %}
+                    </td>
                     <td class="px-6 py-3 text-right font-semibold text-stone-800">
                         {% if stock.current_value %}${{ stock.current_value|floatformat:0 }}{% else %}<span class="text-stone-300">—</span>{% endif %}
                     </td>