Implement Bubble Tea Terminal UI (TUI)

- Added Bubble Tea, Lipgloss, and Bubbles dependencies
- Implemented TUI package in tui/ for browsing feeds and items
- Added --tui flag to main command
- Verified build and existing tests

1 files changed, 43 insertions, 0 deletions

diff --git a/tui/style.go b/tui/style.go
new file mode 100644
index 0000000..7b21c78
--- /dev/null
+++ b/tui/style.go
@@ -0,0 +1,43 @@
+package tui
+
+import "github.com/charmbracelet/lipgloss"
+
+var (
+	// Colors
+	maroon   = lipgloss.Color("#800000")
+	lavender = lipgloss.Color("#E6E6FA")
+	gray     = lipgloss.Color("#808080")
+	darkGray = lipgloss.Color("#404040")
+
+	// Styles
+	TitleStyle = lipgloss.NewStyle().
+			Bold(true).
+			Foreground(lavender).
+			Background(maroon).
+			Padding(0, 1)
+
+	ListStyle = lipgloss.NewStyle().
+			Padding(1, 2)
+
+	SelectedItemStyle = lipgloss.NewStyle().
+				PaddingLeft(2).
+				Foreground(lavender).
+				Background(darkGray).
+				Bold(true)
+
+	ItemStyle = lipgloss.NewStyle().
+			PaddingLeft(2)
+
+	HeaderStyle = lipgloss.NewStyle().
+			Bold(true).
+			Foreground(maroon).
+			MarginBottom(1)
+
+	ContentStyle = lipgloss.NewStyle().
+			Padding(1, 4)
+
+	StatusStyle = lipgloss.NewStyle().
+			Foreground(gray).
+			Italic(true).
+			MarginTop(1)
+)