fix: add patient form validation and auth proxy

- Fix dateOfBirth default from empty string to null (caused Invalid date error)
- Add noValidate to form to prevent browser native email validation blocking submit
- Reset form when switching from edit to add mode
- Export API_BASE_URL from queryClient; switch patient table to raw fetch (prevents token wipe on 401)
- Add Authorization header forwarding in Vite proxy (was stripped by nginx Connection:upgrade)
- Make only firstName, lastName, dateOfBirth, phone required; gender optional
- Add +1 prefix to phone number input (stores as 1XXXXXXXXXX)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/types/patient-types.ts

@@ -51,7 +51,15 @@ export const insertPatientSchema = (
     createdAt: true,
   })
   .extend({
-    insuranceId: insuranceIdSchema, // enforce numeric insuranceId
+    firstName: z.string().min(1, "First name is required"),
+    lastName: z.string().min(1, "Last name is required"),
+    dateOfBirth: z.preprocess(
+      (val) => (val === null || val === undefined || val === "" ? undefined : val),
+      z.coerce.date({ required_error: "Date of birth is required" })
+    ),
+    gender: z.string().optional().nullable(),
+    phone: z.string().min(1, "Phone number is required"),
+    insuranceId: insuranceIdSchema,
   });
 
 export type InsertPatient = z.infer<typeof insertPatientSchema>;