feat: assignee field in feedback widget

- New GET /api/collaborators?repo= endpoint fetches repo owner + collabs
- Assignee dropdown added to the new issue form (lazy-loaded on first open)
- Selected assignee is forwarded to Gitea via the assignees[] field
- Dropdown resets to Unassigned after successful submission

Closes #5

server.js

@@ -71,14 +71,33 @@ app.get(['/api/issues', BASE + '/api/issues'], async (req, res) => {
   } catch (e) { res.status(500).json({ error: e.message }); }
 });
 
+// GET /api/collaborators?repo=owner/repo
+app.get(['/api/collaborators', BASE + '/api/collaborators'], async (req, res) => {
+  const { repo } = req.query;
+  if (!repo) return res.status(400).json({ error: 'repo required' });
+  try {
+    const users = await giteaRequest('GET', `/api/v1/repos/${repo}/collaborators?limit=50`);
+    // Also include the owner
+    const repoInfo = await giteaRequest('GET', `/api/v1/repos/${repo}`);
+    const owner = repoInfo.owner ? [{ login: repoInfo.owner.login }] : [];
+    const collabs = Array.isArray(users) ? users.map(u => ({ login: u.login })) : [];
+    // Dedupe
+    const seen = new Set();
+    const all = [...owner, ...collabs].filter(u => { if (seen.has(u.login)) return false; seen.add(u.login); return true; });
+    res.json(all);
+  } catch (e) { res.status(500).json({ error: e.message }); }
+});
+
 // POST /api/feedback — create new issue
 app.post(['/api/feedback', BASE + '/api/feedback'], async (req, res) => {
-  const { title, body, repo, source_url } = req.body;
+  const { title, body, repo, source_url, assignee } = req.body;
   if (!title) return res.status(400).json({ error: 'title required' });
   if (!repo) return res.status(400).json({ error: 'repo required' });
   const issueBody = [body || '', '', '---', `*Submitted via feedback widget from: ${source_url || 'unknown'}*`].join('\n');
+  const payload = { title, body: issueBody };
+  if (assignee) payload.assignees = [assignee];
   try {
-    const issue = await giteaRequest('POST', `/api/v1/repos/${repo}/issues`, { title, body: issueBody });
+    const issue = await giteaRequest('POST', `/api/v1/repos/${repo}/issues`, payload);
     if (issue.number) res.json({ ok: true, issue_number: issue.number, issue_url: issue.html_url });
     else res.status(500).json({ error: 'Failed', raw: JSON.stringify(issue).slice(0, 200) });
   } catch (e) { res.status(500).json({ error: e.message }); }
@@ -151,6 +170,14 @@ app.get(['/widget.js', BASE + '/widget.js'], (req, res) => {
     .fb-issue-arrow { color:#444; font-size:.8rem; flex-shrink:0; }
     .fb-empty { color:#555; font-size:.85rem; text-align:center; padding:1.5rem 0; }
     .fb-loading { color:#555; font-size:.85rem; text-align:center; padding:1rem 0; }
+    /* Assignee select */
+    .fb-select { background:#0d0d0d; border:1px solid #2a2a2a; border-radius:8px;
+      padding:.6rem .8rem; color:#e0e0e0; font-size:.875rem; width:100%; font-family:inherit;
+      outline:none; transition:border-color .15s; appearance:none;
+      background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
+      background-repeat:no-repeat; background-position:right .7rem center; padding-right:2rem; }
+    .fb-select:focus { border-color:#7c9ef5; }
+    .fb-field-label { color:#666; font-size:.75rem; margin-bottom:.2rem; }
     /* Picker row inside new-issue form */
     .fb-picker-row { display:flex; align-items:center; gap:.6rem; }
     .fb-picker-btn { background:#1a2a1a; border:1px solid #2a4a2a; color:#6fcf6f; font-size:.78rem;
@@ -205,6 +232,12 @@ app.get(['/widget.js', BASE + '/widget.js'], (req, res) => {
           <div style="display:flex;flex-direction:column;gap:.8rem;">
             <input class="fb-input" id="_fb-title" type="text" placeholder="Title (required)" />
             <textarea class="fb-textarea" id="_fb-desc" placeholder="Describe your feedback…"></textarea>
+            <div>
+              <div class="fb-field-label">Assignee</div>
+              <select class="fb-select" id="_fb-assignee">
+                <option value="">— Unassigned —</option>
+              </select>
+            </div>
             <div class="fb-picker-row">
               <button class="fb-picker-btn" id="_fb-pick-btn">🎯 Pick element</button>
               <span class="fb-picker-hint" id="_fb-pick-hint">Click to reference a page element</span>
@@ -224,8 +257,26 @@ app.get(['/widget.js', BASE + '/widget.js'], (req, res) => {
   \`;
   document.body.appendChild(overlay);
 
+  // ── Load collaborators into assignee dropdown ─────────────────────────────
+  var assigneesLoaded = false;
+  function loadAssignees() {
+    if (assigneesLoaded || !cfg.repo) return;
+    assigneesLoaded = true;
+    fetch(SELF + '/api/collaborators?repo=' + encodeURIComponent(cfg.repo))
+      .then(function(r) { return r.json(); })
+      .then(function(users) {
+        var sel = document.getElementById('_fb-assignee');
+        if (!Array.isArray(users)) return;
+        users.forEach(function(u) {
+          var opt = document.createElement('option');
+          opt.value = u.login; opt.textContent = u.login;
+          sel.appendChild(opt);
+        });
+      }).catch(function() {});
+  }
+
   // ── Open / close ──────────────────────────────────────────────────────────
-  function openOverlay() { overlay.classList.add('open'); }
+  function openOverlay() { overlay.classList.add('open'); loadAssignees(); }
   function closeOverlay() { overlay.classList.remove('open'); }
 
   fab.addEventListener('click', function() {
@@ -347,19 +398,21 @@ app.get(['/widget.js', BASE + '/widget.js'], (req, res) => {
   document.getElementById('_fb-submit').addEventListener('click', function() {
     var title = document.getElementById('_fb-title').value.trim();
     var body = document.getElementById('_fb-desc').value.trim();
+    var assignee = document.getElementById('_fb-assignee').value;
     var status = document.getElementById('_fb-status');
     var btn = document.getElementById('_fb-submit');
     if (!title) { status.style.color='#f57c7c'; status.textContent='Title is required.'; return; }
     btn.disabled = true; status.style.color='#888'; status.textContent='Submitting…';
     fetch(SELF + '/api/feedback', {
       method: 'POST', headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ title, body, repo: cfg.repo, source_url: window.location.href })
+      body: JSON.stringify({ title, body, repo: cfg.repo, source_url: window.location.href, assignee: assignee || undefined })
     }).then(function(r) { return r.json(); }).then(function(d) {
       if (d.ok) {
         status.style.color='#6fcf6f';
         status.textContent='✓ Issue #' + d.issue_number + ' created!';
         document.getElementById('_fb-title').value = '';
         document.getElementById('_fb-desc').value = '';
+        document.getElementById('_fb-assignee').value = '';
         document.getElementById('_fb-snippet-wrap').style.display = 'none';
         document.getElementById('_fb-pick-hint').textContent = 'Click to reference a page element';
         capturedSnippet = '';