fix: style version number in startup screen accent orange

Apply the existing ACCENT colour (rgb 240 148 100) to the version
string so it stands out against the dim label, matching the warm
orange used throughout the startup screen for stars and status text.

Requested in #95.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/StartupScreen.ts

@@ -174,7 +174,7 @@ export function printStartupScreen(): void {
   out.push(boxRow(sRow, W, sLen))
 
   out.push(`${rgb(...BORDER)}\u255a${'\u2550'.repeat(W - 2)}\u255d${RESET}`)
-  out.push(`  ${DIM}${rgb(...DIMCOL)}openclaude v${MACRO.DISPLAY_VERSION ?? MACRO.VERSION}${RESET}`)
+  out.push(`  ${DIM}${rgb(...DIMCOL)}openclaude ${RESET}${rgb(...ACCENT)}v${MACRO.DISPLAY_VERSION ?? MACRO.VERSION}${RESET}`)
   out.push('')
 
   process.stdout.write(out.join('\n') + '\n')