fix: rework wallet deletion per review feedback

- Remove all red/danger styling, use standard monochrome colors
- Add wallet picker dropdown instead of relying on selectedWallet
- Fix encryptedSecret field name (was wallet.encrypted)
- Populate dropdown when settings view opens
- Confirmation modal uses standard border styling

src/popup/views/settings.js

@@ -71,6 +71,17 @@ function show() {
     $("settings-blockscout").value = state.blockscoutUrl;
     renderTrackedTokens();
     renderSiteLists();
+    // Populate wallet deletion dropdown
+    const sel = $("delete-wallet-select");
+    sel.innerHTML = "";
+    for (let i = 0; i < state.wallets.length; i++) {
+        const opt = document.createElement("option");
+        opt.value = i;
+        opt.textContent = state.wallets[i].name || "Wallet " + (i + 1);
+        sel.appendChild(opt);
+    }
+    $("delete-wallet-confirm").classList.add("hidden");
+
     showView("settings");
 }