v0.0.2: polish tui rendering

Add visible activity state for running turns.
Move model metadata below the input area.
Render assistant Markdown with theme-aware styling.

internal/tui/markdown.go

@@ -0,0 +1,68 @@
+package tui
+
+import (
+	"strings"
+
+	"github.com/charmbracelet/glamour"
+	"github.com/charmbracelet/glamour/ansi"
+	glamstyles "github.com/charmbracelet/glamour/styles"
+)
+
+const minMarkdownWidth = 20
+
+func renderMarkdown(content string, width int, th theme) string {
+	width = max(minMarkdownWidth, width)
+	renderer, err := glamour.NewTermRenderer(
+		glamour.WithStyles(markdownStyle(th)),
+		glamour.WithWordWrap(width),
+	)
+	if err != nil {
+		return content
+	}
+
+	rendered, err := renderer.Render(content)
+	if err != nil {
+		return content
+	}
+	return strings.TrimRight(rendered, "\n")
+}
+
+func markdownStyle(th theme) ansi.StyleConfig {
+	cfg := glamstyles.LightStyleConfig
+	if th.Mode == ThemeDark {
+		cfg = glamstyles.DarkStyleConfig
+	}
+
+	zero := uint(0)
+	cfg.Document.Margin = &zero
+	cfg.Document.BlockPrefix = ""
+	cfg.Document.BlockSuffix = ""
+	cfg.Document.Color = stringPtr(th.Text)
+
+	cfg.Heading.Color = stringPtr(th.Assistant)
+	cfg.H1.Prefix = ""
+	cfg.H1.Suffix = ""
+	cfg.H1.Color = stringPtr(th.Assistant)
+	cfg.H1.BackgroundColor = nil
+	cfg.H1.Bold = boolPtr(true)
+
+	cfg.BlockQuote.Color = stringPtr(th.Muted)
+	cfg.Link.Color = stringPtr(th.User)
+	cfg.LinkText.Color = stringPtr(th.User)
+
+	cfg.Code.Color = stringPtr(th.Tool)
+	cfg.Code.BackgroundColor = stringPtr(th.SurfaceAlt)
+	cfg.CodeBlock.Color = stringPtr(th.Text)
+	cfg.CodeBlock.BackgroundColor = nil
+	cfg.CodeBlock.Margin = &zero
+
+	return cfg
+}
+
+func stringPtr(value string) *string {
+	return &value
+}
+
+func boolPtr(value bool) *bool {
+	return &value
+}