fix(tui): answer card — darker bg-1 surface, symmetric padding

The card used the WebUI's bg-2 card token (#10131A), which is tuned to
sit on the WebUI's near-black page base. A terminal's own background is
unknown and often neutral gray (VS Code's #1E1E1E), where bg-2 reads
loudly blue. One step down EMBER's ladder — bg-1 #0B0D12, the chrome
layer — keeps the card a quiet recessed panel on any dark terminal.

Vertical framing was asymmetric: glamour's document block prefix added a
blank line on top while render() trimmed the trailing ones, so the card
carried one line of top padding and none below. The document
block prefix/suffix are now stripped in answerGlamourStyle and the card
owns the frame: Padding(1,1) — one line above and below, one column each
side, identical for finalized (glamour) and streaming (raw) answers.

Author: jkyberneees

internal/tui/copyclean_test.go

@@ -108,7 +108,7 @@ func TestAnswerCard(t *testing.T) {
 	lipgloss.SetColorProfile(termenv.TrueColor)
 	defer lipgloss.SetColorProfile(termenv.Ascii)
 	for name, wantESC := range map[string]string{
-		"ember-dark":    "[48;2;16;19;26m",    // #10131A
+		"ember-dark":    "[48;2;11;13;18m",    // #0B0D12 (EMBER bg-1)
 		"ember-light":   "[48;2;239;236;229m", // #EFECE5
 		"classic":       "[48;2;22;22;30m",    // #16161E
 		"high-contrast": "",
@@ -151,7 +151,7 @@ func TestAnswerCard(t *testing.T) {
 		t.Error("user turn painted a surface — only the answer carries one")
 	}
 	asstOut, _ := m.renderMessage(m.msgs[1], 1, 0)
-	if !strings.Contains(asstOut, "[48;2;16;19;26m") {
+	if !strings.Contains(asstOut, "[48;2;11;13;18m") {
 		t.Errorf("answer card surface missing:\n%q", asstOut)
 	}
 	if !strings.Contains(plain(asstOut), "Fixed. The cookie was stale.") {
@@ -174,7 +174,7 @@ func TestSurfaceWeave(t *testing.T) {
 	defer lipgloss.SetColorProfile(termenv.Ascii)
 
 	// weaveSurface is the exact transformation: reset → reset + surface.
-	bg := "\x1b[48;2;16;19;26m"
+	bg := "\x1b[48;2;11;13;18m"
 	woven := weaveSurface("\x1b[38;2;231;233;238mspan1\x1b[0m gap \x1b[38;2;231;233;238;1mspan2\x1b[0m", bg)
 	want := "\x1b[38;2;231;233;238mspan1\x1b[0m" + bg + " gap \x1b[38;2;231;233;238;1mspan2\x1b[0m" + bg
 	if woven != want {

internal/tui/styles.go

@@ -61,8 +61,12 @@ var (
 		faint:    "#6B7280",
 		bodyText: "#8B95A8",
 		hairline: "#2E3242",
-		surface:  "#10131A",
-		grad:     [2][3]int{{0xFF, 0xC9, 0x5E}, {0xFF, 0x8A, 0x3D}},
+		// bg-1, not the WebUI's bg-2 card token: the TUI's "page base" is
+		// the terminal's own background — often neutral gray — where bg-2
+		// reads loudly blue. One step down keeps the card a quiet recessed
+		// panel on any dark terminal.
+		surface: "#0B0D12",
+		grad:    [2][3]int{{0xFF, 0xC9, 0x5E}, {0xFF, 0x8A, 0x3D}},
 	}
 
 	// emberLight mirrors the WebUI light theme (parchment base, deeper amber
@@ -160,7 +164,9 @@ func paletteByName(name string) palette {
 // fine on a bare terminal, but it reads dimmed on the answer card's
 // surface. The document text instead takes the palette's full-brightness
 // body color; the light theme builds on glamour's light preset so code
-// blocks and highlights stay tuned for a light background.
+// blocks and highlights stay tuned for a light background. The document's
+// block prefix/suffix newlines are stripped: vertical framing belongs to
+// the card's symmetric padding alone.
 func answerGlamourStyle() ansi.StyleConfig {
 	name := themeName()
 	cfg := styles.DarkStyleConfig
@@ -170,6 +176,8 @@ func answerGlamourStyle() ansi.StyleConfig {
 	// Assign a fresh pointer — the preset is a package-level shared value.
 	c := string(paletteByName(name).text)
 	cfg.Document.Color = &c
+	cfg.Document.BlockPrefix = ""
+	cfg.Document.BlockSuffix = ""
 	return cfg
 }
 
@@ -409,9 +417,12 @@ func themeFrom(p palette) theme {
 	}
 }
 
-// surfaceStyle builds the user-turn card style; empty means no surface.
+// surfaceStyle builds the answer card style; empty means no surface. The
+// padding is symmetric — one line above and below, one column each side —
+// because glamour's document newlines are stripped in answerGlamourStyle;
+// the frame belongs to the card alone.
 func surfaceStyle(c lipgloss.Color) lipgloss.Style {
-	st := lipgloss.NewStyle().Padding(0, 1)
+	st := lipgloss.NewStyle().Padding(1, 1)
 	if c != "" {
 		st = st.Background(c)
 	}