Fix diff viewer related changes (#114)

Author: FourWindff

src/components/ChangedFilesList.tsx

@@ -489,6 +489,7 @@ export function ChangedFilesList(props: ChangedFilesListProps) {
         'font-family': "'JetBrains Mono', monospace",
         'font-size': sf(12),
         outline: 'none',
+        'user-select': 'none',
       }}
     >
       <div style={{ flex: '1', overflow: 'auto', padding: '4px 0' }}>

src/components/DiffViewerDialog.tsx

@@ -261,6 +261,7 @@ function DiffViewerContent(props: DiffViewerDialogProps) {
           padding: `${headerPaddingTop} 20px 12px`,
           'border-bottom': `1px solid ${theme.border}`,
           'flex-shrink': '0',
+          'user-select': 'none',
         }}
       >
         <div
@@ -426,6 +427,7 @@ function DiffViewerContent(props: DiffViewerDialogProps) {
               display: 'flex',
               'align-items': 'center',
               gap: '6px',
+              'user-select': 'none',
             }}
           >
             Changed Files

src/components/ScrollingDiffView.tsx

@@ -575,6 +575,7 @@ function FileSection(props: {
           background: `color-mix(in srgb, ${theme.bgElevated} 96%, white)`,
           'border-bottom': `1px solid ${theme.border}`,
           cursor: 'pointer',
+          'user-select': 'none',
         }}
       >
         {/* Collapse indicator */}