feat: Migrate from Socket.IO to Server-Sent Events (SSE)

- Replace Socket.IO with SSE for real-time server-to-client communication
- Add SSE service with client management and topic-based subscriptions
- Implement SSE authentication middleware and streaming endpoints
- Update all backend routes to emit SSE events instead of Socket.IO
- Create SSE context provider for frontend with EventSource API
- Update all frontend components to use SSE instead of Socket.IO
- Add comprehensive SSE tests for both backend and frontend
- Remove Socket.IO dependencies and legacy files
- Update documentation to reflect SSE architecture

Benefits:
- Simpler architecture using native browser EventSource API
- Lower bundle size (removed socket.io-client dependency)
- Better compatibility with reverse proxies and load balancers
- Reduced resource usage for Raspberry Pi deployment
- Standard HTTP-based real-time communication

🤖 Generated with [AI Assistant]

Co-Authored-By: AI Assistant <noreply@ai-assistant.com>

node_modules/playwright/lib/mcp/browser/codegen.js

@@ -0,0 +1,66 @@
+"use strict";
+var __defProp = Object.defineProperty;
+var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
+var __getOwnPropNames = Object.getOwnPropertyNames;
+var __hasOwnProp = Object.prototype.hasOwnProperty;
+var __export = (target, all) => {
+  for (var name in all)
+    __defProp(target, name, { get: all[name], enumerable: true });
+};
+var __copyProps = (to, from, except, desc) => {
+  if (from && typeof from === "object" || typeof from === "function") {
+    for (let key of __getOwnPropNames(from))
+      if (!__hasOwnProp.call(to, key) && key !== except)
+        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
+  }
+  return to;
+};
+var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
+var codegen_exports = {};
+__export(codegen_exports, {
+  escapeWithQuotes: () => escapeWithQuotes,
+  formatObject: () => formatObject,
+  quote: () => quote
+});
+module.exports = __toCommonJS(codegen_exports);
+function escapeWithQuotes(text, char = "'") {
+  const stringified = JSON.stringify(text);
+  const escapedText = stringified.substring(1, stringified.length - 1).replace(/\\"/g, '"');
+  if (char === "'")
+    return char + escapedText.replace(/[']/g, "\\'") + char;
+  if (char === '"')
+    return char + escapedText.replace(/["]/g, '\\"') + char;
+  if (char === "`")
+    return char + escapedText.replace(/[`]/g, "\\`") + char;
+  throw new Error("Invalid escape char");
+}
+function quote(text) {
+  return escapeWithQuotes(text, "'");
+}
+function formatObject(value, indent = "  ", mode = "multiline") {
+  if (typeof value === "string")
+    return quote(value);
+  if (Array.isArray(value))
+    return `[${value.map((o) => formatObject(o)).join(", ")}]`;
+  if (typeof value === "object") {
+    const keys = Object.keys(value).filter((key) => value[key] !== void 0).sort();
+    if (!keys.length)
+      return "{}";
+    const tokens = [];
+    for (const key of keys)
+      tokens.push(`${key}: ${formatObject(value[key])}`);
+    if (mode === "multiline")
+      return `{
+${tokens.join(`,
+${indent}`)}
+}`;
+    return `{ ${tokens.join(", ")} }`;
+  }
+  return String(value);
+}
+// Annotate the CommonJS export names for ESM import in node:
+0 && (module.exports = {
+  escapeWithQuotes,
+  formatObject,
+  quote
+});