feat: create follow-up and continue updates (Closes #665)

src/frontend_bundle.py

@@ -22,7 +22,7 @@ COMMONJS_BROWSER_BRANCH = re.compile(
 WORKER_RUNTIME_SOURCE = "static/background-issue-sync.js"
 FEATURE_SOURCES = {
     "comment-actions": ("static/conversation.js", "static/comment-actions.js"),
-    "issue-capture": ("static/create-issue-sheet.js",),
+    "issue-capture": ("static/create-issue-sheet.js", "static/update-follow-up.js"),
     "pull-workflow": ("static/pull-sheet.js", "static/review-sheet.js"),
     "push-notifications": ("static/push-notifications.js",),
     "device-setup": ("static/install-app.js", "static/mobile-device-setup.js"),