fix(onboarding): clearer bubbles and tighter composer

apps/shared/ClawdisKit/Sources/ClawdisChatUI/ChatComposer.swift

@@ -41,7 +41,7 @@ struct ClawdisChatComposer: View {
                     .lineLimit(2)
             }
         }
-        .padding(8)
+        .padding(self.composerPadding)
         .background(
             RoundedRectangle(cornerRadius: 18, style: .continuous)
                 .fill(ClawdisChatTheme.composerBackground)
@@ -144,9 +144,9 @@ struct ClawdisChatComposer: View {
                         self.sendButton
                     }
                 }
-                .padding(8)
+            .padding(self.editorPadding)
             }
-            .frame(minHeight: 44, idealHeight: 44, maxHeight: 96)
+            .frame(minHeight: self.editorMinHeight, idealHeight: self.editorMinHeight, maxHeight: self.editorMaxHeight)
     }
 
     private var connectionPill: some View {
@@ -179,7 +179,7 @@ struct ClawdisChatComposer: View {
             ChatComposerTextView(text: self.$viewModel.input) {
                 self.viewModel.send()
             }
-            .frame(minHeight: 32, idealHeight: 32, maxHeight: 72)
+            .frame(minHeight: self.textMinHeight, idealHeight: self.textMinHeight, maxHeight: self.textMaxHeight)
             .padding(.horizontal, 6)
             .padding(.vertical, 4)
             #else
@@ -254,6 +254,30 @@ struct ClawdisChatComposer: View {
         self.style == .standard
     }
 
+    private var composerPadding: CGFloat {
+        self.style == .onboarding ? 6 : 8
+    }
+
+    private var editorPadding: CGFloat {
+        self.style == .onboarding ? 6 : 8
+    }
+
+    private var editorMinHeight: CGFloat {
+        self.style == .onboarding ? 38 : 44
+    }
+
+    private var editorMaxHeight: CGFloat {
+        self.style == .onboarding ? 72 : 96
+    }
+
+    private var textMinHeight: CGFloat {
+        self.style == .onboarding ? 28 : 32
+    }
+
+    private var textMaxHeight: CGFloat {
+        self.style == .onboarding ? 60 : 72
+    }
+
     #if os(macOS)
     private func pickFilesMac() {
         let panel = NSOpenPanel()

apps/shared/ClawdisKit/Sources/ClawdisChatUI/ChatMessageViews.swift

@@ -77,6 +77,7 @@ private struct ChatMessageBody: View {
         .background(self.bubbleBackground)
         .overlay(self.bubbleBorder)
         .clipShape(RoundedRectangle(cornerRadius: ChatUIConstants.bubbleCorner, style: .continuous))
+        .shadow(color: self.bubbleShadowColor, radius: self.bubbleShadowRadius, y: self.bubbleShadowYOffset)
     }
 
     private var primaryText: String {
@@ -101,10 +102,33 @@ private struct ChatMessageBody: View {
     }
 
     private var bubbleBorder: some View {
-        RoundedRectangle(cornerRadius: ChatUIConstants.bubbleCorner, style: .continuous)
-            .strokeBorder(
-                self.isUser ? Color.white.opacity(0.12) : Color.black.opacity(0.08),
-                lineWidth: self.isUser ? 0.5 : 1)
+        let borderColor: Color
+        let lineWidth: CGFloat
+        if self.isUser {
+            borderColor = Color.white.opacity(0.12)
+            lineWidth = 0.5
+        } else if self.style == .onboarding {
+            borderColor = ClawdisChatTheme.onboardingAssistantBorder
+            lineWidth = 0.8
+        } else {
+            borderColor = Color.black.opacity(0.08)
+            lineWidth = 1
+        }
+
+        return RoundedRectangle(cornerRadius: ChatUIConstants.bubbleCorner, style: .continuous)
+            .strokeBorder(borderColor, lineWidth: lineWidth)
+    }
+
+    private var bubbleShadowColor: Color {
+        self.style == .onboarding && !self.isUser ? Color.black.opacity(0.28) : .clear
+    }
+
+    private var bubbleShadowRadius: CGFloat {
+        self.style == .onboarding && !self.isUser ? 6 : 0
+    }
+
+    private var bubbleShadowYOffset: CGFloat {
+        self.style == .onboarding && !self.isUser ? 2 : 0
     }
 }
 
@@ -243,7 +267,9 @@ private struct MarkdownTextView: View {
             of: "(?<!\\n)\\n(?!\\n)",
             with: " \\n",
             options: .regularExpression)
-        if let attributed = try? AttributedString(markdown: normalized) {
+        let options = AttributedString.MarkdownParsingOptions(
+            interpretedSyntax: .inlineOnlyPreservingWhitespace)
+        if let attributed = try? AttributedString(markdown: normalized, options: options) {
             Text(attributed)
                 .font(.system(size: 14))
                 .foregroundStyle(self.textColor)

apps/shared/ClawdisKit/Sources/ClawdisChatUI/ChatTheme.swift

@@ -49,12 +49,22 @@ enum ClawdisChatTheme {
 
     static var onboardingAssistantBubble: Color {
         #if os(macOS)
-        Color(nsColor: .controlBackgroundColor).opacity(0.92)
+        let base = NSColor.controlBackgroundColor
+        let blended = base.blended(withFraction: 0.22, of: .white) ?? base
+        return Color(nsColor: blended)
         #else
         Color(uiColor: .secondarySystemBackground)
         #endif
     }
 
+    static var onboardingAssistantBorder: Color {
+        #if os(macOS)
+        Color.white.opacity(0.12)
+        #else
+        Color.white.opacity(0.12)
+        #endif
+    }
+
     static var userText: Color { .white }
 
     static var assistantText: Color {