feat: delete ticker from database when removed from portfolio

- Add DELETE support to /api/stocks endpoint via _method parameter
- Modify removeStock to delete db- prefixed entries from database
- Add confirmation dialog on delete button click
- Add test for stock deletion

app/routes/analyze.tsx

@@ -221,7 +221,25 @@ export default function Analyze() {
     updatePositions();
   }, [stocks.length]);
 
-  const removeStock = (id: string) => {
+  const removeStock = async (id: string) => {
+    const stock = stocks.find((s) => s.id === id);
+    if (!stock) return;
+
+    // Delete from database if this was a manually added stock (db- prefix)
+    if (id.startsWith("db-")) {
+      try {
+        const formData = new FormData();
+        formData.append("_method", "DELETE");
+        formData.append("ticker", stock.ticker);
+        await fetch("/api/stocks", {
+          method: "POST",
+          body: formData,
+        });
+      } catch (err) {
+        console.error("[analyze] Error deleting stock from DB:", err);
+      }
+    }
+
     setStocks((s) => s.filter((stock) => stock.id !== id));
   };
 
@@ -346,12 +364,16 @@ export default function Analyze() {
                           >
                             {stock.loading ? "Running..." : "Analyze"}
                           </button>
-                          <button
-                            onClick={() => removeStock(stock.id)}
-                            className="bg-red-600 text-white px-3 py-1 rounded text-sm hover:bg-red-700"
-                          >
-                            Delete
-                          </button>
+<button
+                             onClick={async () => {
+                               if (confirm(`Remove ${stock.ticker}?`)) {
+                                 await removeStock(stock.id);
+                               }
+                             }}
+                             className="bg-red-600 text-white px-3 py-1 rounded text-sm hover:bg-red-700"
+                           >
+                             Delete
+                           </button>
                         </div>
                       </td>
                     </tr>