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_test.go

@@ -0,0 +1,44 @@
+package tui
+
+import (
+	"regexp"
+	"strings"
+	"testing"
+)
+
+func TestRenderMarkdownSupportsCommonAssistantContent(t *testing.T) {
+	rendered := renderMarkdown("# Title\n\n- one\n- two\n\n```go\nfmt.Println(\"x\")\n```", 80, themeForMode(ThemeLight))
+	plain := stripANSI(rendered)
+	for _, want := range []string{"Title", "one", "two", `fmt.Println("x")`} {
+		if !strings.Contains(plain, want) {
+			t.Fatalf("markdown output missing %q:\n%s", want, rendered)
+		}
+	}
+	if strings.Contains(plain, "# Title") {
+		t.Fatalf("heading was not rendered:\n%s", rendered)
+	}
+}
+
+func TestRenderMarkdownSupportsThemesAndNarrowWidth(t *testing.T) {
+	for _, mode := range []ThemeMode{ThemeLight, ThemeDark} {
+		rendered := renderMarkdown("**bold** and `code`", 4, themeForMode(mode))
+		plain := stripANSI(rendered)
+		if rendered == "" {
+			t.Fatalf("empty markdown output for %s", mode)
+		}
+		for _, want := range []string{"bold", "code"} {
+			if !strings.Contains(plain, want) {
+				t.Fatalf("markdown output for %s missing %q:\n%s", mode, want, rendered)
+			}
+		}
+		if strings.Contains(plain, "**bold**") {
+			t.Fatalf("strong markdown was not rendered for %s:\n%s", mode, rendered)
+		}
+	}
+}
+
+var ansiPattern = regexp.MustCompile(`\x1b\[[0-9;:]*[A-Za-z]`)
+
+func stripANSI(value string) string {
+	return ansiPattern.ReplaceAllString(value, "")
+}