Remove sort arrows from node list header

Sort column is now indicated by highlight color only, arrows were
interfering with column alignment.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: statico

src/ui/components/NodesPanel.tsx

@@ -120,19 +120,15 @@ export function NodesPanel({ nodes, selectedIndex, height = 20, inspectorHeight
 
       {/* Node list */}
       <Box height={listHeight} flexDirection="column">
-        {/* Header with sort indicator */}
+        {/* Header - sorted column is highlighted */}
         <Box paddingX={1}>
           <Text color={theme.fg.muted}>{"NAME".padEnd(8)}</Text>
           <Text color={theme.fg.muted}>{"ID".padEnd(11)}</Text>
           <Text color={sortKey === "favorites" ? theme.fg.accent : theme.fg.muted}>{"★ "}</Text>
-          <Text color={sortKey === "hops" ? theme.fg.accent : theme.fg.muted}>{sortKey === "hops" ? (sortAscending ? "↑" : "↓") : " "}</Text>
-          <Text color={sortKey === "hops" ? theme.fg.accent : theme.fg.muted}>{"HOP".padEnd(3)}</Text>
-          <Text color={sortKey === "snr" ? theme.fg.accent : theme.fg.muted}>{sortKey === "snr" ? (sortAscending ? "↑" : "↓") : " "}</Text>
+          <Text color={sortKey === "hops" ? theme.fg.accent : theme.fg.muted}>{"HOP".padEnd(4)}</Text>
           <Text color={sortKey === "snr" ? theme.fg.accent : theme.fg.muted}>{"SNR".padStart(7)} </Text>
-          <Text color={sortKey === "battery" ? theme.fg.accent : theme.fg.muted}>{sortKey === "battery" ? (sortAscending ? "↑" : "↓") : " "}</Text>
-          <Text color={sortKey === "battery" ? theme.fg.accent : theme.fg.muted}>{"BAT".padEnd(4)}</Text>
-          <Text color={sortKey === "time" ? theme.fg.accent : theme.fg.muted}>{sortKey === "time" ? (sortAscending ? "↑" : "↓") : " "}</Text>
-          <Text color={sortKey === "time" ? theme.fg.accent : theme.fg.muted}>{"AGE".padEnd(5)}</Text>
+          <Text color={sortKey === "battery" ? theme.fg.accent : theme.fg.muted}>{"BAT".padEnd(5)}</Text>
+          <Text color={sortKey === "time" ? theme.fg.accent : theme.fg.muted}>{"AGE".padEnd(6)}</Text>
           <Text color={theme.fg.muted}>{"R "}</Text>
           <Box flexGrow={1}><Text color={theme.fg.muted}>LONG NAME</Text></Box>
           <Box width={16}><Text color={theme.fg.muted}>MODEL</Text></Box>