Session 2026-05-30: task detail page overhaul

- New TaskDetail replaces /tasks/:id (was v2 at /requests/:id/v2)
- Overview tab: R00 request info, Requested By/Date/Sign Count inline row, Notes, Sign Family, files, amendments
- Revisions tab: R01+ from submissions, newest first, same layout as overview, per-entry Amend button
- Comments tab: single-line input, post on Enter, delete own comments, Supabase task_comments table
- Folder tab: placeholder for file sharing
- Tab badges showing revision/comment counts
- Amend Request modal: drag-drop file zone, popupOverlayStyle/Surface, Save+Cancel buttons
- Request Revision modal for clients on approved/invoiced/paid tasks
- JSZip download-all with progress popup for submission files
- Upload progress popup for Add Task and amend file uploads
- FileAttachment drop zone: 8px radius, transparent bg, label style fix (no all-caps override)
- PageLoader on task detail load
- task_comments migration with RLS policies

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/requestSubmission.js

@@ -80,6 +80,9 @@ export async function createInitialSubmissionForRequest({
   requestKey,
   isHot,
   serviceType,
+  signFamily,
+  signCount,
+  signs,
   deadline,
   description,
   submittedBy,
@@ -94,6 +97,8 @@ export async function createInitialSubmissionForRequest({
       type: 'initial',
       is_hot: isHot,
       service_type: serviceType,
+      sign_family: signFamily || null,
+      sign_count: signCount || null,
       deadline: deadline || null,
       description,
       submitted_by: submittedBy,
@@ -102,7 +107,19 @@ export async function createInitialSubmissionForRequest({
     .select()
     .single();
 
-  if (!error && submission) return { submission, duplicate: false };
+  if (!error && submission) {
+    if (signs?.length > 0) {
+      await supabase.from('submission_signs').insert(
+        signs.map((s, i) => ({
+          submission_id: submission.id,
+          sign_number: i + 1,
+          sign_name: s.signName,
+          sign_family: s.signFamily || null,
+        }))
+      );
+    }
+    return { submission, duplicate: false };
+  }
 
   if (error?.code === '23505' && requestKey) {
     const { data: existingSubmission, error: existingError } = await supabase