Add YouTrack pull/push sync with project settings and time tracking.

Wire manual Y menu and CLI sync for issues and work items, persist
per-project credentials, and keep local edits until an explicit push.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/ui/helpbar.go

@@ -33,10 +33,18 @@ func (m Model) helpEntries() []helpEntry {
 			{"a-z", "jump"},
 			{"enter", "select"},
 			{"n", "new project"},
+			{"e", "edit"},
+			{"Y", "YouTrack"},
 			{"x", "delete"},
 			{"X", "force delete"},
 			{"esc", "cancel"},
 		}
+	case ModeEditProject:
+		return []helpEntry{
+			{"tab/↑↓", "fields"},
+			{"enter", "save"},
+			{"esc", "cancel"},
+		}
 	case ModeMoveTicket:
 		return []helpEntry{
 			{"j/k", "navigate"},
@@ -51,6 +59,13 @@ func (m Model) helpEntries() []helpEntry {
 			{"enter", "apply"},
 			{"esc", "cancel"},
 		}
+	case ModeSync:
+		return []helpEntry{
+			{"j/k", "select"},
+			{"p/u", "jump"},
+			{"enter", "run"},
+			{"esc", "cancel"},
+		}
 	case ModeBoard:
 		return []helpEntry{
 			{"j/k", "navigate"},
@@ -106,6 +121,7 @@ func (m Model) helpEntries() []helpEntry {
 			{"t/T", "timer/log"},
 			{"m", "entries"},
 			{"r", "report"},
+			{"Y", "YouTrack"},
 			{"u/U", "undo/redo"},
 			{"/", "search"},
 			{"p", "project"},