feat: [WIP] implement scp by bgo

frontend/src/views/SettingsView.vue

@@ -289,6 +289,7 @@ onMounted(load)
               <option value="password">Password</option>
               <option value="key">SSH-Key</option>
               <option value="kerberos">Kerberos</option>
+              <option value="bgo">bgo</option>
             </select>
           </label>
           <label class="field">
@@ -350,6 +351,18 @@ onMounted(load)
         keys. Make sure password-less login already works (e.g. via
         <code>ssh-copy-id</code>).
       </p>
+      <p v-else-if="config.ssh.authMethod === 'bgo'" class="hint">
+        bgo mode delegates uploads to the internal <code>bgo scp</code> client,
+        which handles authentication itself. Install bgo and add it to your
+        <code>PATH</code> first — see the
+        <a
+          href="https://bytedance.larkoffice.com/wiki/HpUCw7qRDiW66YkzKdwcXYrTnLf"
+          target="_blank"
+          rel="noopener"
+        >setup guide</a>.
+        Note: bgo cannot create remote directories, so screenshots are saved
+        flat into the remote home directory (the Remote path setting is ignored).
+      </p>
       <p
         v-else-if="config.ssh.authMethod === 'password' && !config.ssh.password"
         class="hint warn"