ios: unify attachment controls and message typography

ios/Packages/Sybil/Sources/Sybil/SybilAgentAttachmentViews.swift

@@ -32,8 +32,9 @@ struct AgentPickedPhoto: Transferable, Sendable {
     }
 }
 
-struct AgentAttachmentComposer: View {
+struct AgentAttachmentComposer<Prompt: View>: View {
     @Bindable var room: SybilAgentRoom
+    @ViewBuilder var prompt: () -> Prompt
     @State private var modalID = UUID()
     @State private var pickerSession: UUID?
     @State private var showChoices = false
@@ -78,10 +79,17 @@ struct AgentAttachmentComposer: View {
             if !room.attachmentDraft.supportsAttachments && !room.attachmentDraft.items.isEmpty {
                 Text(AgentAttachmentIssue.unavailable.localizedDescription).font(.sybil(.caption)).foregroundStyle(SybilTheme.danger)
             }
-            if room.attachmentDraft.supportsAttachments {
-                Button { pickerSession = room.attachmentSessionID; showChoices = true } label: { Label("Attach", systemImage: "paperclip") }
-                    .font(.sybil(.caption, weight: .semibold)).accessibilityIdentifier("agent-attach")
-                    .disabled(room.attachmentDraft.items.count >= (room.attachmentDraft.capability?.countLimit ?? 0))
+            HStack(alignment: .bottom, spacing: 10) {
+                if room.attachmentDraft.supportsAttachments {
+                    SybilPromptAttachmentButton(
+                        isEnabled: room.attachmentDraft.items.count < (room.attachmentDraft.capability?.countLimit ?? 0)
+                    ) {
+                        pickerSession = room.attachmentSessionID
+                        showChoices = true
+                    }
+                    .accessibilityIdentifier("agent-attach")
+                }
+                prompt()
             }
         }
         .confirmationDialog("Add attachment", isPresented: $showChoices) {

ios/Packages/Sybil/Sources/Sybil/SybilAgentView.swift

@@ -205,19 +205,16 @@ struct SybilAgentView: View {
     }
 
     private var composer: some View {
-        VStack(alignment: .leading, spacing: 8) {
-            AgentAttachmentComposer(room: room)
-            HStack(alignment: .bottom, spacing: 10) {
-                SybilPromptField(
-                    text: $room.composer,
-                    focused: $composerFocused,
-                    submit: submitComposer
-                )
-                .accessibilityIdentifier("agent-composer")
+        AgentAttachmentComposer(room: room) {
+            SybilPromptField(
+                text: $room.composer,
+                focused: $composerFocused,
+                submit: submitComposer
+            )
+            .accessibilityIdentifier("agent-composer")
 
-                SybilPromptSendButton(canSend: canSendComposer, submit: submitComposer)
-                .accessibilityIdentifier("agent-send")
-            }
+            SybilPromptSendButton(canSend: canSendComposer, submit: submitComposer)
+            .accessibilityIdentifier("agent-send")
         }
         .padding(.horizontal, 14)
         .padding(.bottom, 12)

ios/Packages/Sybil/Sources/Sybil/SybilChatTranscriptView.swift

@@ -230,15 +230,7 @@ struct MessageBubble: View {
                             presentation: matchingStreamingAssistantPresentation
                         )
                     } else if !message.content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
-                        if isUser {
-                            Text(message.content)
-                                .font(.sybil(.body))
-                        } else {
-                            Markdown(message.content)
-                                .tint(SybilTheme.primary)
-                                .foregroundStyle(SybilTheme.text.opacity(0.95))
-                                .markdownTheme(.sybilReadable)
-                        }
+                        SybilMessageText(content: message.content, format: isUser ? .literal : .markdown)
                     }
                 }
                 .padding(.horizontal, isUser || agentStyle ? 14 : 2)
@@ -371,10 +363,7 @@ struct StreamingAssistantContentView: View {
             }
 
             if hasAnswer {
-                Markdown(content)
-                    .tint(SybilTheme.primary)
-                    .foregroundStyle(SybilTheme.text.opacity(0.95))
-                    .markdownTheme(.sybilReadable)
+                SybilMessageText(content: content, format: .markdown)
                     .textSelection(.enabled)
                     .id("streaming-assistant-answer")
                     .transition(answerTransition)

ios/Packages/Sybil/Sources/Sybil/SybilMessageText.swift

@@ -0,0 +1,36 @@
+import MarkdownUI
+import SwiftUI
+
+/// Both roles and both workspaces use normal chat's readable, Dynamic Type-aware theme.
+/// Literal input is built from text nodes, never passed through the Markdown parser.
+struct SybilMessageText: View {
+    enum Format { case literal, markdown }
+    var content: String
+    var format: Format
+
+    static func literalContent(_ text: String) -> MarkdownContent {
+        // Pasted CRLF/CR and blank lines containing spaces or tabs have the same
+        // paragraph boundaries as Markdown. Keep the newline count so deliberate
+        // extra blank lines survive; nonblank lines and Markdown syntax stay literal.
+        let normalized = text.replacingOccurrences(of: "\r\n", with: "\n")
+            .replacingOccurrences(of: "\r", with: "\n")
+            .components(separatedBy: "\n")
+            .map { line in line.allSatisfy { $0 == " " || $0 == "\t" } ? "" : line }
+            .joined(separator: "\n")
+        return MarkdownContent {
+            for paragraph in normalized.components(separatedBy: "\n\n") {
+                Paragraph {
+                    // Keep extra blank paragraphs visible, including leading/trailing ones.
+                    paragraph.isEmpty ? "\u{00a0}" : paragraph
+                }
+            }
+        }
+    }
+
+    var body: some View {
+        Markdown(format == .literal ? Self.literalContent(content) : MarkdownContent(content))
+            .tint(SybilTheme.primary)
+            .foregroundStyle(format == .literal ? SybilTheme.text : SybilTheme.text.opacity(0.95))
+            .markdownTheme(.sybilReadable)
+    }
+}

ios/Packages/Sybil/Sources/Sybil/SybilPromptField.swift

@@ -60,3 +60,26 @@ struct SybilPromptSendButton: View {
         .accessibilityLabel("Send message")
     }
 }
+
+/// The normal chat attachment control, shared with Agent's composer.
+/// Picker ownership and availability stay with each composer.
+struct SybilPromptAttachmentButton: View {
+    var isEnabled: Bool
+    var action: () -> Void
+
+    var body: some View {
+        Button(action: action) {
+            Image(systemName: "paperclip")
+                .font(.system(size: 17, weight: .semibold))
+                .frame(width: 40, height: 40)
+                .background(Circle().fill(SybilTheme.surface))
+                .overlay(Circle().stroke(SybilTheme.border.opacity(0.82), lineWidth: 1))
+                .foregroundStyle(isEnabled ? SybilTheme.text : SybilTheme.textMuted)
+                .frame(width: 44, height: 44)
+                .contentShape(Rectangle())
+        }
+        .buttonStyle(.plain)
+        .disabled(!isEnabled)
+        .accessibilityLabel("Attach file")
+    }
+}

ios/Packages/Sybil/Sources/Sybil/SybilWorkspaceView.swift

@@ -592,25 +592,10 @@ struct SybilWorkspaceView: View {
 
             HStack(alignment: .bottom, spacing: 10) {
                 if !viewModel.isSearchMode {
-                    Button {
+                    SybilPromptAttachmentButton(isEnabled: !viewModel.isActiveSelectionSending) {
                         isShowingAttachmentOptions = true
-                    } label: {
-                        Image(systemName: "paperclip")
-                            .font(.system(size: 17, weight: .semibold))
-                            .frame(width: 40, height: 40)
-                            .background(
-                                Circle()
-                                    .fill(SybilTheme.surface)
-                            )
-                            .overlay(
-                                Circle()
-                                    .stroke(SybilTheme.border.opacity(0.82), lineWidth: 1)
-                            )
-                            .foregroundStyle(viewModel.isActiveSelectionSending ? SybilTheme.textMuted : SybilTheme.text)
                     }
-                    .buttonStyle(.plain)
-                    .disabled(viewModel.isActiveSelectionSending)
-                    .accessibilityLabel("Attach file")
+                    .accessibilityIdentifier("chat-attach")
                 }
 
                 SybilPromptField(