feat: add authentication, user management, and admin features

Added comprehensive authentication and authorization system:

Authentication System:
- Better Auth integration with session management
- Login/logout pages and API routes
- Middleware for route protection
- Auth utilities and client libraries

User Management:
- User list, detail, and invite pages
- User API endpoints (CRUD operations)
- Session management for users
- Profile settings page

Role-Based Access Control:
- Role management pages (list, create, edit)
- Permission system with granular controls
- Role assignment to users
- Role API endpoints

Admin Features:
- Audit log page for tracking system events
- Admin settings page
- Audit service for logging user actions

Additional Features:
- Quotes management pages and components
- SalesBldr API integration
- Email service for notifications

Configuration & Documentation:
- Updated docker-compose.yml
- MCP server configuration (mcp.json)
- CVE-2025-55182 security review documentation
- Standards guide and PRD documents
- Re-enabling authentication documentation

Database Migrations:
- 012: Auth tables (users, sessions, accounts, verifications)
- 013: Role tables (roles, permissions, role_permissions, user_roles)
- 014: Admin settings table

UI Updates:
- Updated dashboard layout
- Enhanced app layout with auth integration

components/auth/microsoft-button.tsx

@@ -0,0 +1,74 @@
+"use client";
+
+import { useState } from "react";
+import { Loader2 } from "lucide-react";
+import { toast } from "sonner";
+import { authClient } from "@/lib/auth-client";
+import { Button } from "@/components/ui/button";
+
+// Microsoft logo SVG component
+function MicrosoftLogo({ className }: { className?: string }) {
+  return (
+    <svg
+      className={className}
+      viewBox="0 0 21 21"
+      fill="none"
+      xmlns="http://www.w3.org/2000/svg"
+    >
+      <rect x="1" y="1" width="9" height="9" fill="#F25022" />
+      <rect x="11" y="1" width="9" height="9" fill="#7FBA00" />
+      <rect x="1" y="11" width="9" height="9" fill="#00A4EF" />
+      <rect x="11" y="11" width="9" height="9" fill="#FFB900" />
+    </svg>
+  );
+}
+
+interface MicrosoftButtonProps {
+  callbackURL?: string;
+}
+
+export function MicrosoftButton({ callbackURL = "/" }: MicrosoftButtonProps) {
+  const [isLoading, setIsLoading] = useState(false);
+
+  async function handleMicrosoftSignIn() {
+    setIsLoading(true);
+    try {
+      const result = await authClient.signIn.social({
+        provider: "microsoft",
+        callbackURL,
+      });
+
+      if (result.error) {
+        toast.error(result.error.message || "Failed to sign in with Microsoft");
+        setIsLoading(false);
+      }
+      // If successful, the user will be redirected to Microsoft's OAuth page
+    } catch (error) {
+      toast.error("An unexpected error occurred");
+      console.error("Microsoft sign-in error:", error);
+      setIsLoading(false);
+    }
+  }
+
+  return (
+    <Button
+      type="button"
+      variant="outline"
+      className="w-full"
+      onClick={handleMicrosoftSignIn}
+      disabled={isLoading}
+    >
+      {isLoading ? (
+        <>
+          <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+          Connecting...
+        </>
+      ) : (
+        <>
+          <MicrosoftLogo className="mr-2 h-4 w-4" />
+          Continue with Microsoft 365
+        </>
+      )}
+    </Button>
+  );
+}