fix(web): a poll says how it is published, and needs no text of its own

With a poll open the button reads «Publicar encuesta» and two options are
enough. The «Más» menu keeps the page's gutter on a phone.

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

libs/web/tracker/presenters/src/lib/pages/issue.page.scss

@@ -92,6 +92,8 @@
 .ts-menu {
   display: grid;
   width: min(22rem, calc(100vw - 2rem));
+  // Pushed against the screen's edge on a phone: keep the page's gutter.
+  margin-inline-start: 1rem;
   padding: 0.375rem;
   border: 1px solid var(--ts-line);
   border-radius: 0.75rem;
@@ -1052,6 +1054,12 @@ a.ts-key {
   }
 }
 
+.ts-poll-editor__hint {
+  margin: 0 0 0.875rem;
+  color: var(--ts-muted);
+  font-size: 0.8125rem;
+}
+
 .ts-poll-editor__row {
   display: flex;
   gap: 0.5rem;

libs/web/tracker/presenters/src/lib/pages/issue.page.ts

@@ -1364,6 +1364,10 @@ const MAX_FILE_BYTES = 25 * 1024 * 1024;
                 @if (pollOn()) {
                   <fieldset class="ts-poll-editor">
                     <legend>Encuesta · de 2 a 6 opciones</legend>
+                    <p class="ts-poll-editor__hint">
+                      La pregunta va en el texto de arriba. Se publica con el
+                      comentario, al pulsar «Publicar encuesta».
+                    </p>
                     @for (option of pollOptions(); track $index) {
                       <div class="ts-poll-editor__row">
                         <pi-text-field
@@ -1439,8 +1443,12 @@ const MAX_FILE_BYTES = 25 * 1024 * 1024;
                 <div>
                   <pi-action-button
                     color="primary"
-                    text="Comentar"
-                    [disabled]="!commentBody().trim() && !commentFiles().length"
+                    [text]="pollOn() ? 'Publicar encuesta' : 'Comentar'"
+                    [disabled]="
+                      pollOn()
+                        ? pollReady() < 2
+                        : !commentBody().trim() && !commentFiles().length
+                    "
                     (execute)="addComment()"
                   />
                 </div>
@@ -2578,6 +2586,8 @@ export class IssuePage {
     // Only files (a recording, say) need no words: their names say it.
     const body =
       this.commentBody().trim() ||
+      // A poll alone asks its own question.
+      (this.pollOn() ? '📊 ¿Qué opción preferís?' : '') ||
       (files.length === 1
         ? `📎 ${files[0].name}`
         : files.length
@@ -2600,6 +2610,10 @@ export class IssuePage {
   /** A quick poll in the new comment: its options while it is written. */
   protected readonly pollOn = signal(false);
   protected readonly pollOptions = signal<string[]>(['', '']);
+  /** Options written so far: two make a poll ready to publish. */
+  protected readonly pollReady = computed(
+    () => this.pollOptions().filter((o) => o.trim()).length,
+  );
 
   protected startPoll(): void {
     this.pollOptions.set(['', '']);