Hide Changes tab when not git repo and add refresh button to Files pane

- Hide Changes tab completely when isGit is false instead of just muting it
- Automatically switch to Files tab if user was on Changes when it becomes hidden
- Add refresh button next to sort button in Files pane header
- Refresh button refreshes root directory, expanded directories, and file preview if open

packages/app/src/components/explorer-sidebar.tsx

@@ -263,25 +263,33 @@ function SidebarContent({
   const { status } = useCheckoutStatusQuery({ serverId, cwd });
   const isGit = status?.isGit ?? false;
 
+  // Switch to Files tab if Changes tab is hidden and user was on it
+  useEffect(() => {
+    if (!isGit && activeTab === "changes") {
+      onTabPress("files");
+    }
+  }, [isGit, activeTab, onTabPress]);
+
   return (
     <View style={styles.sidebarContent} pointerEvents="auto">
       {/* Header with tabs and close button */}
       <View style={styles.header} testID="explorer-header">
         <View style={styles.tabsContainer}>
-          <Pressable
-            style={[styles.tab, activeTab === "changes" && styles.tabActive]}
-            onPress={() => onTabPress("changes")}
-          >
-            <Text
-              style={[
-                styles.tabText,
-                activeTab === "changes" && styles.tabTextActive,
-                !isGit && styles.tabTextMuted,
-              ]}
+          {isGit && (
+            <Pressable
+              style={[styles.tab, activeTab === "changes" && styles.tabActive]}
+              onPress={() => onTabPress("changes")}
             >
-              Changes
-            </Text>
-          </Pressable>
+              <Text
+                style={[
+                  styles.tabText,
+                  activeTab === "changes" && styles.tabTextActive,
+                ]}
+              >
+                Changes
+              </Text>
+            </Pressable>
+          )}
           <Pressable
             style={[styles.tab, activeTab === "files" && styles.tabActive]}
             onPress={() => onTabPress("files")}

packages/app/src/components/file-explorer-pane.tsx

@@ -33,6 +33,7 @@ import {
   FolderOpen,
   Image as ImageIcon,
   MoreVertical,
+  RotateCw,
   X,
 } from "lucide-react-native";
 import type {
@@ -263,6 +264,26 @@ export function FileExplorerPane({ serverId, agentId }: FileExplorerPaneProps) {
     setSortOption(SORT_OPTIONS[nextIndex].value);
   }, [sortOption, setSortOption]);
 
+  const handleRefresh = useCallback(() => {
+    if (!agentId || !requestDirectoryListing) {
+      return;
+    }
+    // Refresh the root directory
+    requestDirectoryListing(agentId, ".", { recordHistory: false, setCurrentPath: false });
+
+    // Also refresh any expanded directories
+    expandedPaths.forEach((path) => {
+      if (path !== ".") {
+        requestDirectoryListing(agentId, path, { recordHistory: false, setCurrentPath: false });
+      }
+    });
+
+    // Refresh the preview if a file is selected
+    if (selectedEntryPath && requestFilePreview) {
+      requestFilePreview(agentId, selectedEntryPath);
+    }
+  }, [agentId, expandedPaths, requestDirectoryListing, requestFilePreview, selectedEntryPath]);
+
   const currentSortLabel = SORT_OPTIONS.find((opt) => opt.value === sortOption)?.label ?? "Name";
 
   const treeRows = useMemo(() => {
@@ -603,9 +624,23 @@ export function FileExplorerPane({ serverId, agentId }: FileExplorerPaneProps) {
               </GestureDetector>
               <View style={styles.paneHeader} testID="files-pane-header">
                 <View style={styles.paneHeaderLeft} />
-                <Pressable style={styles.sortButton} onPress={handleSortCycle}>
-                  <Text style={styles.sortButtonText}>{currentSortLabel}</Text>
-                </Pressable>
+                <View style={styles.paneHeaderRight}>
+                  <Pressable
+                    onPress={handleRefresh}
+                    hitSlop={8}
+                    style={({ hovered, pressed }) => [
+                      styles.iconButton,
+                      (hovered || pressed) && styles.iconButtonHovered,
+                    ]}
+                    accessibilityRole="button"
+                    accessibilityLabel="Refresh files"
+                  >
+                    <RotateCw size={16} color={theme.colors.foregroundMuted} />
+                  </Pressable>
+                  <Pressable style={styles.sortButton} onPress={handleSortCycle}>
+                    <Text style={styles.sortButtonText}>{currentSortLabel}</Text>
+                  </Pressable>
+                </View>
               </View>
               <FlatList
                 style={styles.treeList}
@@ -622,9 +657,23 @@ export function FileExplorerPane({ serverId, agentId }: FileExplorerPaneProps) {
             <View style={[styles.treePane, styles.treePaneFill]}>
               <View style={styles.paneHeader} testID="files-pane-header">
                 <View style={styles.paneHeaderLeft} />
-                <Pressable style={styles.sortButton} onPress={handleSortCycle}>
-                  <Text style={styles.sortButtonText}>{currentSortLabel}</Text>
-                </Pressable>
+                <View style={styles.paneHeaderRight}>
+                  <Pressable
+                    onPress={handleRefresh}
+                    hitSlop={8}
+                    style={({ hovered, pressed }) => [
+                      styles.iconButton,
+                      (hovered || pressed) && styles.iconButtonHovered,
+                    ]}
+                    accessibilityRole="button"
+                    accessibilityLabel="Refresh files"
+                  >
+                    <RotateCw size={16} color={theme.colors.foregroundMuted} />
+                  </Pressable>
+                  <Pressable style={styles.sortButton} onPress={handleSortCycle}>
+                    <Text style={styles.sortButtonText}>{currentSortLabel}</Text>
+                  </Pressable>
+                </View>
               </View>
               <FlatList
                 style={styles.treeList}
@@ -1023,6 +1072,12 @@ const styles = StyleSheet.create((theme) => ({
     flex: 1,
     minWidth: 0,
   },
+  paneHeaderRight: {
+    flexDirection: "row",
+    alignItems: "center",
+    gap: theme.spacing[2],
+    flexShrink: 0,
+  },
   previewHeaderRight: {
     flexDirection: "row",
     alignItems: "center",