fix texthooker gate, overlay fallback, and control server byte limit

- gate --texthooker flag on both CLI useTexthooker arg and plugin texthookerEnabled
- remove erroneous return that blocked legacy app startup fallback after control command failure
- fix open-config-settings to only skipRender when window actually opened
- track raw byte count for accurate 64KB limit in app control server

launcher/commands/playback-command.ts

@@ -282,7 +282,9 @@ export async function runPlaybackCommandWithDeps(
             pluginRuntimeConfig.autoStartVisibleOverlay
               ? '--show-visible-overlay'
               : '--hide-visible-overlay',
-            ...(pluginRuntimeConfig.texthookerEnabled ? ['--texthooker'] : []),
+            ...(args.useTexthooker && effectivePluginRuntimeConfig.texthookerEnabled
+              ? ['--texthooker']
+              : []),
           ]
         : [];
     await deps.startOverlay(appPath, args, mpvSocketPath, extraAppArgs);