Integrate lt.time.ago() for dashboard timestamps, update README

- Add data-ts attributes to table and card view date cells so JS can
  convert them to relative time ("2h ago") while keeping the full date
  in the title attribute for hover tooltips
- Add initRelativeTimes() in dashboard.js using lt.time.ago(); runs on
  DOMContentLoaded and refreshes every 60s so times stay current
- Fix table sort for date columns to read data-ts attribute instead of
  text content (which is now relative and not sortable as a date)
- Update README: add base.css/base.js/utils.js to project structure,
  fix ascii-banner.js description, expand keyboard shortcuts table,
  add developer notes for lt.time and boot sequence behavior

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

README.md

@@ -126,6 +126,11 @@ Access all admin pages via the **Admin dropdown** in the dashboard header.
 | `Ctrl/Cmd + E` | Toggle edit mode (ticket page) |
 | `Ctrl/Cmd + S` | Save changes (ticket page) |
 | `Ctrl/Cmd + K` | Focus search box (dashboard) |
+| `N` | New ticket (dashboard) |
+| `J` / `K` | Next / previous row (dashboard table) |
+| `Enter` | Open selected ticket (dashboard) |
+| `G` then `D` | Go to dashboard |
+| `1`–`4` | Quick status change (ticket page) |
 | `ESC` | Cancel edit / close modal |
 | `?` | Show keyboard shortcuts help |
 
@@ -242,17 +247,20 @@ tinker_tickets/
 │   └── upload_attachment.php             # GET/POST: List or upload attachments
 ├── assets/
 │   ├── css/
+│   │   ├── base.css                      # LotusGuild Terminal Design System (symlinked from web_template)
 │   │   ├── dashboard.css                 # Dashboard + terminal styling
 │   │   └── ticket.css                    # Ticket view styling
 │   ├── js/
 │   │   ├── advanced-search.js            # Advanced search modal
-│   │   ├── ascii-banner.js               # ASCII art banner
+│   │   ├── ascii-banner.js               # ASCII art banner (rendered in boot overlay on first visit)
+│   │   ├── base.js                       # LotusGuild JS utilities — window.lt (symlinked from web_template)
 │   │   ├── dashboard.js                  # Dashboard + bulk actions + kanban + sidebar
-│   │   ├── keyboard-shortcuts.js         # Keyboard shortcuts
+│   │   ├── keyboard-shortcuts.js         # Keyboard shortcuts (uses lt.keys)
 │   │   ├── markdown.js                   # Markdown rendering + ticket linking (XSS-safe)
 │   │   ├── settings.js                   # User preferences
 │   │   ├── ticket.js                     # Ticket + comments + visibility
-│   │   └── toast.js                      # Toast notifications
+│   │   ├── toast.js                      # Backwards-compat shim → delegates to lt.toast
+│   │   └── utils.js                      # escapeHtml (→ lt.escHtml) + getTicketIdFromUrl
 │   └── images/
 │       └── favicon.png
 ├── config/
@@ -387,6 +395,8 @@ Key conventions and gotchas for working with this codebase:
 15. **CSP nonces**: All inline `<script>` tags require `nonce="<?php echo $nonce; ?>"`
 16. **Visibility validation**: Internal visibility requires at least one group — validated server-side
 17. **Rate limiting**: Both session-based AND IP-based limits are enforced
+18. **Relative timestamps**: Dashboard dates use `lt.time.ago()` and refresh every 60s; full date is always in the `title` attribute for hover
+19. **Boot sequence**: Shows ASCII banner then boot messages on first page visit per session (`sessionStorage.getItem('booted')`); removed on subsequent loads
 
 ## File Reference