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-core/lib/client/dialog.js

@@ -0,0 +1,56 @@
+"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 dialog_exports = {};
+__export(dialog_exports, {
+  Dialog: () => Dialog
+});
+module.exports = __toCommonJS(dialog_exports);
+var import_channelOwner = require("./channelOwner");
+var import_page = require("./page");
+class Dialog extends import_channelOwner.ChannelOwner {
+  static from(dialog) {
+    return dialog._object;
+  }
+  constructor(parent, type, guid, initializer) {
+    super(parent, type, guid, initializer);
+    this._page = import_page.Page.fromNullable(initializer.page);
+  }
+  page() {
+    return this._page;
+  }
+  type() {
+    return this._initializer.type;
+  }
+  message() {
+    return this._initializer.message;
+  }
+  defaultValue() {
+    return this._initializer.defaultValue;
+  }
+  async accept(promptText) {
+    await this._channel.accept({ promptText });
+  }
+  async dismiss() {
+    await this._channel.dismiss();
+  }
+}
+// Annotate the CommonJS export names for ESM import in node:
+0 && (module.exports = {
+  Dialog
+});