feat: Enhance provider components with detailed documentation and comments

- Added comprehensive comments and JSDoc-style documentation to NotificationProvider, ThemeProvider, UserProvider, and WebsiteThemeProvider for better clarity and maintainability.
- Improved type definitions in index.ts for better code understanding and usage.
- Introduced Docker support with Dockerfiles for various services including AI server, signaling server, and browser-use service.
- Created a docker-compose.yml file to orchestrate multiple services including PostgreSQL, AI, scraper, and frontend.
- Added a startup guide (startup.txt) for setting up the CRM environment on Ubuntu with Docker.
- Included a .dockerignore file to exclude unnecessary files from Docker builds.

src/app/api/upload/voice/route.ts

@@ -1,9 +1,19 @@
+// ── Upload: Voice Message ────────────────────────────────────────────────────
+// POST /api/upload/voice  — Upload a voice note audio file
+//
+// Auth: authenticated
+// Accepts multipart/form-data with an "audio" file field and "duration" field.
+// Saves the file to public/uploads/voice/ with a UUID filename.
+// Returns the public URL path and duration for use in chat messages.
+
 import { NextRequest, NextResponse } from "next/server"
 import { getSessionUser } from "@/lib/auth"
 import { writeFile } from "node:fs/promises"
 import { join } from "node:path"
 import crypto from "node:crypto"
 
+// ── POST ─────────────────────────────────────────────────────────────────────
+
 export async function POST(request: NextRequest) {
   try {
     const user = await getSessionUser()
@@ -15,6 +25,7 @@ export async function POST(request: NextRequest) {
 
     const duration = parseFloat(formData.get("duration")?.toString() || "0")
 
+    // Always use .webm extension (normalize from whatever the client sends)
     const ext = file.name.endsWith(".webm") ? "webm" : "webm"
     const filename = `${crypto.randomUUID()}.${ext}`
     const buffer = Buffer.from(await file.arrayBuffer())