ui: improve ultra mode colors, separators, and navigation

- Theme: SelectedBG changed from purple (57) to dark grey (238) so
  selected cards are clearly distinct from the status bar; priority
  badge colors switched to subtler dark variants (red/blue/green)
- Ultra header: ID bold white, urgency amber, age dim, status grey;
  no background on unselected cards (pure black terminal background)
- Priority badge: 3-char wide centred pill with white text
- Annotations: italic and dimmer (244) vs description (253)
- Card separator: full-width ─── line in dim grey (237) instead of
  a blank line, making task boundaries easier to scan
- u key in ultra mode toggles back to table view (syncs cursor);
  from --ultra startup mode u is a no-op since there is no table to
  return to
- q/esc from --ultra startup mode exits directly instead of dropping
  to the table view (ultraStartup flag tracks launch origin)

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

1 files changed, 4 insertions, 0 deletions

diff --git a/internal/ui/table.go b/internal/ui/table.go
index ef81b9a..4cb918f 100644
--- a/internal/ui/table.go
+++ b/internal/ui/table.go
@@ -91,6 +91,7 @@ type detailViewState struct {
 // ultraState holds the state for the ultra mode task list and its search UI.
 type ultraState struct {
 	showUltra        bool
+	ultraStartup     bool // true when ultra was set via --ultra flag; q quits directly
 	ultraCursor      int
 	ultraOffset      int
 	ultraSearching   bool
@@ -1328,6 +1329,9 @@ func (m *Model) SetDisco(d bool) {
 
 // SetUltra enables or disables ultra mode, causing the UI to start directly
 // in the ultra task list view instead of the default table view.
+// When u is true, q/esc quits the application immediately rather than
+// returning to the table view, because there is no table view to return to.
 func (m *Model) SetUltra(u bool) {
 	m.showUltra = u
+	m.ultraStartup = u
 }