diff --git a/crates/tui/src/app.rs b/crates/tui/src/app.rs
index 1489953a..eba58534 100644
--- a/crates/tui/src/app.rs
+++ b/crates/tui/src/app.rs
@@ -16,7 +16,7 @@ use crate::command::{
 use crate::input::InputBuffer;
 use crate::scroll::Scroll;
 use crate::task::TaskStore;
-use crate::ui::Mode;
+use crate::view_mode::Mode;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum CommandCompletionApply {
diff --git a/crates/tui/src/lib.rs b/crates/tui/src/lib.rs
index 16e76e4a..a92543f9 100644
--- a/crates/tui/src/lib.rs
+++ b/crates/tui/src/lib.rs
@@ -12,6 +12,7 @@ mod spawn;
 mod task;
 mod tool;
 mod ui;
+mod view_mode;
 
 use std::future::Future;
 use std::io;
diff --git a/crates/tui/src/tool.rs b/crates/tui/src/tool.rs
index 78cbd209..e74fc8b1 100644
--- a/crates/tui/src/tool.rs
+++ b/crates/tui/src/tool.rs
@@ -12,7 +12,7 @@ use unicode_width::{UnicodeWidthChar, UnicodeWidthStr};
 
 use crate::block::{Block, ToolCallBlock, ToolCallState};
 use crate::cache::FileCache;
-use crate::ui::Mode;
+use crate::view_mode::Mode;
 
 /// Maximum body lines in normal mode for tool output previews.
 const NORMAL_MAX_BODY: usize = 5;
diff --git a/crates/tui/src/ui.rs b/crates/tui/src/ui.rs
index 61706e74..5442bb95 100644
--- a/crates/tui/src/ui.rs
+++ b/crates/tui/src/ui.rs
@@ -31,36 +31,7 @@ use crate::app::{ActionbarNoticeLevel, App, CompletionState, alert_source_label,
 use crate::block::{Block, CompactEvent, ThinkingBlock, ThinkingState};
 use crate::command::CommandCandidate;
 use crate::task::{TaskCounts, TaskEntry, TaskStatus, TaskStore};
-
-/// Display density for the history view.
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub enum Mode {
-    /// Every block fully expanded.
-    Detail,
-    /// Completed blocks compressed to roughly 5–6 lines; in-progress
-    /// tool blocks stay in detail.
-    Normal,
-    /// Each block rendered as a single line.
-    Overview,
-}
-
-impl Mode {
-    pub fn cycle(self) -> Self {
-        match self {
-            Mode::Detail => Mode::Normal,
-            Mode::Normal => Mode::Overview,
-            Mode::Overview => Mode::Detail,
-        }
-    }
-
-    pub fn label(self) -> &'static str {
-        match self {
-            Mode::Detail => "detail",
-            Mode::Normal => "normal",
-            Mode::Overview => "overview",
-        }
-    }
-}
+use crate::view_mode::Mode;
 
 pub fn draw(frame: &mut Frame, app: &mut App) {
     let area = frame.area();
diff --git a/crates/tui/src/view_mode.rs b/crates/tui/src/view_mode.rs
new file mode 100644
index 00000000..ca0877ab
--- /dev/null
+++ b/crates/tui/src/view_mode.rs
@@ -0,0 +1,29 @@
+/// Display density for the history view.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Mode {
+    /// Every block fully expanded.
+    Detail,
+    /// Completed blocks compressed to roughly 5–6 lines; in-progress
+    /// tool blocks stay in detail.
+    Normal,
+    /// Each block rendered as a single line.
+    Overview,
+}
+
+impl Mode {
+    pub fn cycle(self) -> Self {
+        match self {
+            Mode::Detail => Mode::Normal,
+            Mode::Normal => Mode::Overview,
+            Mode::Overview => Mode::Detail,
+        }
+    }
+
+    pub fn label(self) -> &'static str {
+        match self {
+            Mode::Detail => "detail",
+            Mode::Normal => "normal",
+            Mode::Overview => "overview",
+        }
+    }
+}