fix(ui): group creation error, chat UUIDs, file preview, action menu

Bug fixes:
- Group creation "[object Object]" error: removed dead pkcs8 import code
  that threw before GEK wrapping, added array detail handling in hubFetch
- Chat shows usernames instead of UUIDs (sender_name passed through node)
- Join button: navigate to group on "Already a member" instead of error

UI improvements:
- Loading spinner animation for async states (connecting, fetching)
- File action menu (3-dot dropdown: View, Download, Play)
- Click filename to preview inline (images, text/code files)
- FilePreview overlay for images and text files
- Chat file attachment button (upload to node + structured message)
- Chat attachment display (icon, filename, size)
- Member panel: "Group admin" badge instead of plain "Admin" text

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

1 files changed, 4 insertions, 0 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/i18n.js b/packages/meshbay-hub/src/meshbay_hub/static/i18n.js
index 0ec7d4a..8ac35e7 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/i18n.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/i18n.js
@@ -86,6 +86,7 @@ const en = {
   'group.offline_hint': 'Files will appear when a node hosting this group connects.',
   'group.upload': 'Upload',
   'group.uploading': 'Uploading...',
+  'group.view': 'View',
   'group.err_transport': 'Transport module not loaded',
 
   // Status
@@ -101,6 +102,7 @@ const en = {
   'chat.empty': 'No messages yet. Start the conversation!',
   'chat.placeholder': 'Type a message...',
   'chat.send': 'Send',
+  'chat.attach': 'Attach file',
 
   // Video player
   'video.loading': 'Loading {name}...',
@@ -204,7 +206,9 @@ const en = {
 
   // Members
   'members.col_role': 'Role',
+  'members.group_role': 'Group role',
   'members.admin': 'Admin',
+  'members.group_admin': 'Group admin',
   'members.member': 'Member',
   'members.invite_title': 'Invite member',
   'members.username_placeholder': 'Username',