refactor: per-wallet delete with monochrome styling

- Replace 'Danger Zone' section with per-wallet [delete] links in wallet list
- Each wallet shows a [delete] text link (dashed underline, monochrome)
- Clicking opens confirmation modal for that specific wallet
- Remove all red-500 styling, use standard monochrome border-border/text-fg
- Confirmation modal uses bg-well border-dashed border-border
- No longer assumes 'selected wallet' — operates on specific wallet index
- Password verification retained for delete confirmation

src/popup/index.html

@@ -708,9 +708,7 @@
 
                 <div class="bg-well p-3 mx-1 mb-3">
                     <h3 class="font-bold mb-1">Wallets</h3>
-                    <p class="text-xs text-muted mb-2">
-                        Add a new wallet from a recovery phrase or private key.
-                    </p>
+                    <div id="settings-wallet-list" class="mb-2"></div>
                     <button
                         id="btn-main-add-wallet"
                         class="border border-border px-2 py-1 hover:bg-fg hover:text-bg cursor-pointer"
@@ -844,35 +842,15 @@
                     <div id="settings-denied-sites"></div>
                 </div>
 
-                <div
-                    class="bg-well p-3 mx-1 mb-3 border border-dashed border-red-500"
-                >
-                    <h3 class="font-bold mb-1 text-red-500">Danger Zone</h3>
-                    <p class="text-xs text-muted mb-2">
-                        Permanently delete the currently selected wallet. This
-                        cannot be undone. Make sure you have backed up your
-                        recovery phrase before proceeding.
-                    </p>
-                    <button
-                        id="btn-delete-wallet"
-                        class="border border-red-500 text-red-500 px-2 py-1 hover:bg-red-500 hover:text-bg cursor-pointer"
-                    >
-                        Delete Wallet
-                    </button>
-                </div>
-
                 <div
                     id="delete-wallet-confirm"
-                    class="hidden bg-well p-3 mx-1 mb-3 border border-dashed border-red-500"
+                    class="hidden bg-well p-3 mx-1 mb-3 border border-dashed border-border"
                 >
-                    <h3 class="font-bold mb-1 text-red-500">
-                        Confirm Deletion
-                    </h3>
+                    <h3 class="font-bold mb-1">Confirm Deletion</h3>
                     <p class="text-xs text-muted mb-2">
-                        Deleting <strong id="delete-wallet-name"></strong> is
-                        permanent. Any funds on this wallet will be
-                        unrecoverable if you have not backed up your recovery
-                        phrase.
+                        Delete <strong id="delete-wallet-name"></strong>? This
+                        is permanent. Any funds will be unrecoverable without
+                        your recovery phrase.
                     </p>
                     <p class="text-xs mb-2">Enter your password to confirm:</p>
                     <input
@@ -884,9 +862,9 @@
                     <div class="flex gap-2">
                         <button
                             id="btn-delete-wallet-confirm"
-                            class="border border-red-500 text-red-500 px-2 py-1 hover:bg-red-500 hover:text-bg cursor-pointer"
+                            class="border border-border text-fg px-2 py-1 hover:bg-fg hover:text-bg cursor-pointer"
                         >
-                            Delete permanently
+                            Delete
                         </button>
                         <button
                             id="btn-delete-wallet-cancel"