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/components/dashboard/lead-status-chart.tsx

@@ -1,3 +1,8 @@
+// ── Dashboard: Lead Status Donut Chart ──
+// Interactive SVG donut chart showing lead distribution by status.
+// Hover highlights a segment and shows its value/percentage in the center.
+// Includes a legend with colored dots and percentages.
+
 "use client"
 
 import { useState } from "react"
@@ -14,11 +19,13 @@ interface LeadStatusChartProps {
   data: StatusData[]
 }
 
+/** Convert polar coordinates to cartesian */
 function polar(cx: number, cy: number, r: number, deg: number) {
   const rad = ((deg - 90) * Math.PI) / 180
   return { x: cx + r * Math.cos(rad), y: cy + r * Math.sin(rad) }
 }
 
+/** Generate an SVG arc path for a donut segment with inner and outer radii */
 function arcPath(cx: number, cy: number, oR: number, iR: number, start: number, end: number) {
   const gap = 3
   const s = start + gap / 2
@@ -31,6 +38,10 @@ function arcPath(cx: number, cy: number, oR: number, iR: number, start: number,
   return `M${o1.x} ${o1.y} A${oR} ${oR} 0 ${lg} 1 ${o2.x} ${o2.y} L${i1.x} ${i1.y} A${iR} ${iR} 0 ${lg} 0 ${i2.x} ${i2.y}Z`
 }
 
+/**
+ * LeadStatusChart — donut chart with hover interactions, center text display,
+ * and a legend grid. Shows "No data" when total is 0.
+ */
 export function LeadStatusChart({ data }: LeadStatusChartProps) {
   const [hov, setHov] = useState<number | null>(null)