feat: topbar quick capture, fix mobile bottom nav and more panel

- Add quick capture input to topbar (desktop: inline 250px, mobile: full-width
  with submit button) that POSTs to /capture/add with redirect back to current page
- Fix mobile bottom bar: 5 items (Dashboard, Focus, Tasks, Capture, More),
  nowrap/overflow:hidden to prevent multi-line wrapping
- Rebuild mobile More panel as 3-column grid overlay (z-index 998/999/1000 stack)
  with backdrop dismiss, 8 items: Calendar, Notes, Meetings, Decisions, Contacts,
  Processes, Weblinks, Admin
- Add file seed fixture and registry mapping to eliminate 4 test skips
- Add time_budgets form factory patterns to fix 2 test failures

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

tests/registry.py

@@ -44,7 +44,7 @@ PREFIX_TO_SEED = {
     "/processes": "process",
     "/processes/runs": "process_run",
     "/time-budgets": "time_budget",
-    "/files": None,
+    "/files": "file",
     "/admin/trash": None,
 }