DRY pass #3: a secret setting is the text input with a password type (#5373)

SettingsView drew secret and plain text settings as two inputs differing only
in type, autocomplete and the saved-value placeholder; one input binds those.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/views/SettingsView.vue

@@ -139,20 +139,12 @@ onMounted(load);
               >
                 <option v-for="c in it.choices" :key="c" :value="c">{{ c }}</option>
               </select>
-              <input
-                v-else-if="it.secret"
-                :id="it.key"
-                type="password"
-                autocomplete="new-password"
-                :placeholder="it.is_set ? 'Saved — type to replace' : ''"
-                class="w-56 field"
-                :value="String(it.value)"
-                @input="it.value = ($event.target as HTMLInputElement).value"
-              />
               <input
                 v-else
                 :id="it.key"
-                type="text"
+                :type="it.secret ? 'password' : 'text'"
+                :autocomplete="it.secret ? 'new-password' : undefined"
+                :placeholder="it.secret && it.is_set ? 'Saved — type to replace' : undefined"
                 class="w-56 field"
                 :value="String(it.value)"
                 @input="it.value = ($event.target as HTMLInputElement).value"