chore: move widget source into sidecar repo (widget-src/)

Widget builds from widget-src/ → public/widget.js
Vite outDir updated to ../public
.gitignore excludes node_modules

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

widget-src/src/api.ts

@@ -0,0 +1,57 @@
+import type { WidgetConfig, Doctor, TimeSlot } from './types';
+
+let baseUrl = '';
+let widgetKey = '';
+
+export const initApi = (url: string, key: string) => {
+    baseUrl = url;
+    widgetKey = key;
+};
+
+const headers = () => ({
+    'Content-Type': 'application/json',
+    'X-Widget-Key': widgetKey,
+});
+
+export const fetchInit = async (): Promise<WidgetConfig> => {
+    const res = await fetch(`${baseUrl}/api/widget/init?key=${widgetKey}`);
+    if (!res.ok) throw new Error('Widget init failed');
+    return res.json();
+};
+
+export const fetchDoctors = async (): Promise<Doctor[]> => {
+    const res = await fetch(`${baseUrl}/api/widget/doctors?key=${widgetKey}`);
+    if (!res.ok) throw new Error('Failed to load doctors');
+    return res.json();
+};
+
+export const fetchSlots = async (doctorId: string, date: string): Promise<TimeSlot[]> => {
+    const res = await fetch(`${baseUrl}/api/widget/slots?key=${widgetKey}&doctorId=${doctorId}&date=${date}`);
+    if (!res.ok) throw new Error('Failed to load slots');
+    return res.json();
+};
+
+export const submitBooking = async (data: any): Promise<{ appointmentId: string; reference: string }> => {
+    const res = await fetch(`${baseUrl}/api/widget/book?key=${widgetKey}`, {
+        method: 'POST', headers: headers(), body: JSON.stringify(data),
+    });
+    if (!res.ok) throw new Error('Booking failed');
+    return res.json();
+};
+
+export const submitLead = async (data: any): Promise<{ leadId: string }> => {
+    const res = await fetch(`${baseUrl}/api/widget/lead?key=${widgetKey}`, {
+        method: 'POST', headers: headers(), body: JSON.stringify(data),
+    });
+    if (!res.ok) throw new Error('Submission failed');
+    return res.json();
+};
+
+export const streamChat = async (messages: any[], captchaToken?: string): Promise<ReadableStream> => {
+    const res = await fetch(`${baseUrl}/api/widget/chat?key=${widgetKey}`, {
+        method: 'POST', headers: headers(),
+        body: JSON.stringify({ messages, captchaToken }),
+    });
+    if (!res.ok || !res.body) throw new Error('Chat failed');
+    return res.body;
+};