feat: create mobile pull requests from pushed branches (Closes #1362)

frontend/index.html

@@ -1281,6 +1281,7 @@
   <section class="create-issue-panel">
     <div class="create-issue-header">
       <h3 id="create-issue-heading">Capture work</h3>
+      <button id="switch-to-create-pull" type="button">Pull request</button>
       <button id="cancel-new-issue" type="button">Cancel</button>
     </div>
     <aside class="today-capture-interruption" id="today-capture-interruption" role="status" hidden>
@@ -2171,6 +2172,34 @@
   <button class="mobile-task-action" data-mobile-task="queues" type="button" aria-label="Queues: no active queues; no upcoming deadlines"><span>Queues <span class="mobile-task-count" id="mobile-queue-count" hidden>0 active</span></span><span class="mobile-task-deadline" id="mobile-deadline-count" hidden>0 due</span></button>
 </nav>
 
+<div class="create-pull-sheet" id="create-pull-sheet" role="dialog" aria-modal="true" aria-labelledby="create-pull-heading" hidden>
+  <section class="create-pull-panel">
+    <header class="create-pull-header">
+      <div><span class="eyebrow">New</span><h3 id="create-pull-heading">Pull request</h3></div>
+      <button id="cancel-create-pull" type="button">Cancel</button>
+    </header>
+    <p class="small">Open a pull request from a branch already pushed to Gitea.</p>
+    <form id="create-pull-form">
+      <label for="create-pull-repository">Repository
+        <select id="create-pull-repository" required><option value="">Choose repository</option></select>
+      </label>
+      <div class="create-pull-branches">
+        <label for="create-pull-head">Source branch<select id="create-pull-head" required disabled></select></label>
+        <label for="create-pull-base">Base branch<select id="create-pull-base" required disabled></select></label>
+      </div>
+      <output id="create-pull-head-receipt" class="small" aria-live="polite"></output>
+      <label for="create-pull-title">Title<input id="create-pull-title" maxlength="255" required autocomplete="off" /></label>
+      <label for="create-pull-body">Context <span class="small">Optional · Markdown</span><textarea id="create-pull-body" maxlength="10000" rows="5"></textarea></label>
+      <fieldset class="create-pull-mode"><legend>Start as</legend>
+        <label><input type="radio" name="create-pull-mode" value="draft" checked /> Draft</label>
+        <label><input type="radio" name="create-pull-mode" value="ready" /> Ready for review</label>
+      </fieldset>
+      <p id="create-pull-status" role="status" aria-live="polite"></p>
+      <button id="submit-create-pull" type="submit" disabled>Create draft pull request</button>
+    </form>
+  </section>
+</div>
+
 <div class="footer">Creative AI-imbued UI • stackchain-dashboard</div>
 
 <script src="static/private-data-registry.js"></script>
@@ -2259,6 +2288,7 @@
 <script src="static/voice-issue-capture.js"></script>
 <script src="static/voice-conversation-capture.js"></script>
 <script src="static/create-issue-sheet.js"></script>
+<script src="static/create-pull-sheet.js"></script>
 <script src="static/mobile-create-issue-nav.js"></script>
 <script src="static/create-and-start.js"></script>
 <script src="static/assign-and-start.js"></script>