restructured main

model.go

@@ -0,0 +1,30 @@
+package main
+
+import tea "github.com/charmbracelet/bubbletea"
+
+type viewMode int
+
+const (
+	monthView viewMode = iota
+	hourlyView
+)
+
+type model struct {
+	cursorRow   int
+	cursorCol   int
+	monthIndex  int
+	year        int
+	startOffset int // weekday offset where day 1 starts
+	daysInMonth int
+
+	mode viewMode
+
+	// For hourly view
+	selectedDay int
+	hourCursor  int // which hour (0-23) is selected in hourly view
+}
+
+func (m model) Init() tea.Cmd {
+	return nil
+}
+