Frontend uudelleenrakennettu: Astro-komponentit, Wasm pääsäikeessä, ei Workeria

Vanha frontend siirretty temp/. Uusi rakenne:
- StatusBar.astro, Terminal.astro, Editor.astro, Guide.astro
- global.css erillinen
- Wasm pääsäikeessä (ei Worker — yksinkertainen, debugattava)
- Tab-completion, dropdown, projektikortti, Monaco, GUIDE.md
- Ei tokenisointia eikä koodilaboratoriota

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

network-poc/frontend/node_modules/js-yaml/lib/exception.js

@@ -0,0 +1,55 @@
+// YAML error class. http://stackoverflow.com/questions/8458984
+//
+'use strict';
+
+
+function formatError(exception, compact) {
+  var where = '', message = exception.reason || '(unknown reason)';
+
+  if (!exception.mark) return message;
+
+  if (exception.mark.name) {
+    where += 'in "' + exception.mark.name + '" ';
+  }
+
+  where += '(' + (exception.mark.line + 1) + ':' + (exception.mark.column + 1) + ')';
+
+  if (!compact && exception.mark.snippet) {
+    where += '\n\n' + exception.mark.snippet;
+  }
+
+  return message + ' ' + where;
+}
+
+
+function YAMLException(reason, mark) {
+  // Super constructor
+  Error.call(this);
+
+  this.name = 'YAMLException';
+  this.reason = reason;
+  this.mark = mark;
+  this.message = formatError(this, false);
+
+  // Include stack trace in error object
+  if (Error.captureStackTrace) {
+    // Chrome and NodeJS
+    Error.captureStackTrace(this, this.constructor);
+  } else {
+    // FF, IE 10+ and Safari 6+. Fallback for others
+    this.stack = (new Error()).stack || '';
+  }
+}
+
+
+// Inherit from Error
+YAMLException.prototype = Object.create(Error.prototype);
+YAMLException.prototype.constructor = YAMLException;
+
+
+YAMLException.prototype.toString = function toString(compact) {
+  return this.name + ': ' + formatError(this, compact);
+};
+
+
+module.exports = YAMLException;