diff --git a/.gitignore b/.gitignore
index ce9645a0..cfe2afda 100644
--- a/.gitignore
+++ b/.gitignore
@@ -90,4 +90,4 @@ apps/
 .claude/codemap_*
 
 # Maintainer-internal design notes (trade-secret material, never published)
-.private/
+.private/
\ No newline at end of file
diff --git a/crates/tui/src/localization.rs b/crates/tui/src/localization.rs
index b76d6a4b..3f78e844 100644
--- a/crates/tui/src/localization.rs
+++ b/crates/tui/src/localization.rs
@@ -332,6 +332,7 @@ pub enum MessageId {
     KbScrollTranscript,
     KbNavigateHistory,
     KbScrollTranscriptAlt,
+    KbBrowseHistory,
     KbScrollPage,
     KbJumpTopBottom,
     KbJumpTopBottomEmpty,
@@ -566,6 +567,7 @@ pub const ALL_MESSAGE_IDS: &[MessageId] = &[
     MessageId::KbScrollTranscript,
     MessageId::KbNavigateHistory,
     MessageId::KbScrollTranscriptAlt,
+    MessageId::KbBrowseHistory,
     MessageId::KbScrollPage,
     MessageId::KbJumpTopBottom,
     MessageId::KbJumpTopBottomEmpty,
@@ -1039,6 +1041,7 @@ fn english(id: MessageId) -> &'static str {
             "Scroll transcript, navigate input history, or select composer attachments"
         }
         MessageId::KbNavigateHistory => "Navigate input history",
+        MessageId::KbBrowseHistory => "Browse conversation history",
         MessageId::KbScrollTranscriptAlt => "Scroll transcript",
         MessageId::KbScrollPage => "Scroll transcript by page",
         MessageId::KbJumpTopBottom => "Jump to top / bottom of transcript",
@@ -1416,6 +1419,7 @@ fn japanese(id: MessageId) -> Option<&'static str> {
             "会話履歴をスクロール、入力履歴を移動、または添付ファイルを選択"
         }
         MessageId::KbNavigateHistory => "入力履歴を移動",
+        MessageId::KbBrowseHistory => "会話履歴を閲覧",
         MessageId::KbScrollTranscriptAlt => "会話履歴をスクロール",
         MessageId::KbScrollPage => "ページ単位で会話履歴をスクロール",
         MessageId::KbJumpTopBottom => "会話履歴の先頭/末尾へジャンプ",
@@ -1742,6 +1746,7 @@ fn chinese_simplified(id: MessageId) -> Option<&'static str> {
         }
         MessageId::KbScrollTranscript => "滚动对话记录、浏览输入历史或选择附件",
         MessageId::KbNavigateHistory => "浏览输入历史",
+        MessageId::KbBrowseHistory => "浏览对话历史",
         MessageId::KbScrollTranscriptAlt => "滚动对话记录",
         MessageId::KbScrollPage => "按页滚动对话记录",
         MessageId::KbJumpTopBottom => "跳转到对话顶部/底部",
@@ -2088,6 +2093,7 @@ fn portuguese_brazil(id: MessageId) -> Option<&'static str> {
             "Rolar transcrição, navegar histórico de entrada ou selecionar anexos do compositor"
         }
         MessageId::KbNavigateHistory => "Navegar histórico de entrada",
+        MessageId::KbBrowseHistory => "Navegar histórico da conversa",
         MessageId::KbScrollTranscriptAlt => "Rolar transcrição",
         MessageId::KbScrollPage => "Rolar transcrição por página",
         MessageId::KbJumpTopBottom => "Pular para topo / fim da transcrição",
@@ -2366,4 +2372,4 @@ mod tests {
         }
         out
     }
-}
+}
\ No newline at end of file
diff --git a/crates/tui/src/tui/keybindings.rs b/crates/tui/src/tui/keybindings.rs
index c58437fb..1e489edc 100644
--- a/crates/tui/src/tui/keybindings.rs
+++ b/crates/tui/src/tui/keybindings.rs
@@ -93,6 +93,11 @@ pub const KEYBINDINGS: &[KeybindingEntry] = &[
         description_id: crate::localization::MessageId::KbScrollTranscriptAlt,
         section: KeybindingSection::Navigation,
     },
+    KeybindingEntry {
+        chord: "Shift+↑ / Shift+↓",
+        description_id: crate::localization::MessageId::KbBrowseHistory,
+        section: KeybindingSection::Navigation,
+    },
     KeybindingEntry {
         chord: "PgUp / PgDn",
         description_id: crate::localization::MessageId::KbScrollPage,
@@ -368,4 +373,4 @@ mod tests {
         ranks.dedup();
         assert_eq!(ranks.len(), sections.len(), "ranks must be unique");
     }
-}
+}
\ No newline at end of file
diff --git a/crates/tui/src/tui/ui.rs b/crates/tui/src/tui/ui.rs
index 467ee43c..2ea5cc21 100644
--- a/crates/tui/src/tui/ui.rs
+++ b/crates/tui/src/tui/ui.rs
@@ -2721,6 +2721,9 @@ async fn run_event_loop(
                 KeyCode::Up if key.modifiers.contains(KeyModifiers::ALT) => {
                     app.scroll_up(3);
                 }
+                KeyCode::Up if key.modifiers.contains(KeyModifiers::SHIFT) => {
+                    app.scroll_up(3);
+                }
                 KeyCode::Up
                     if key.modifiers.is_empty()
                         && mention_menu_open
@@ -2767,6 +2770,9 @@ async fn run_event_loop(
                 KeyCode::Down if key.modifiers.contains(KeyModifiers::ALT) => {
                     app.scroll_down(3);
                 }
+                KeyCode::Down if key.modifiers.contains(KeyModifiers::SHIFT) => {
+                    app.scroll_down(3);
+                }
                 KeyCode::Down if key.modifiers.is_empty() && mention_menu_open => {
                     app.mention_menu_selected = (app.mention_menu_selected + 1)
                         .min(mention_menu_entries.len().saturating_sub(1));
@@ -9800,4 +9806,4 @@ fn extract_reasoning_header(text: &str) -> Option<String> {
 }
 
 #[cfg(test)]
-mod tests;
+mod tests;
\ No newline at end of file