Auto-save intake data to server after every step

Intake data now persists to DB after each step completion (non-blocking).
If browser crashes, data is recoverable from compliance_orders.intake_data.

Partial saves (_partial: true) only update intake_data without changing
payment_status or marking intake_data_validated. Final submit still
triggers the full validation + worker dispatch flow.

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

site/src/components/intake/Wizard.astro

@@ -484,12 +484,37 @@ const STEP_LABELS: Record<string, string> = {
     if (cancelEvt.defaultPrevented) return;
     if (s.step_index < steps.length - 1) {
       renderStep(s.step_index + 1);
+      // Auto-save intake data to server after every step (non-blocking)
+      autoSaveIntake(loadState());
     } else {
       // Last step — submit the intake data
       submitIntake(s);
     }
   });
 
+  // Auto-save intake data to server after each step (non-blocking, fire-and-forget)
+  function autoSaveIntake(state: IntakeState) {
+    const params = new URLSearchParams(window.location.search);
+    const token = params.get("token");
+    const orderNumber = state.intake_data?.order_number || params.get("order") || "";
+    const API = (window as any).__PW_API || "";
+    if (!orderNumber || !API) return;
+
+    fetch(`${API}/api/v1/compliance-orders/${orderNumber}/intake`, {
+      method: "PUT",
+      headers: {
+        "Content-Type": "application/json",
+        ...(token ? { "Authorization": `Bearer ${token}` } : {}),
+      },
+      body: JSON.stringify({
+        intake_data: state.intake_data,
+        entity: state.entity,
+        officers: state.officers,
+        _partial: true,  // flag that this is an intermediate save, not final
+      }),
+    }).catch(() => {}); // silent — don't block the user
+  }
+
   async function submitIntake(state: IntakeState) {
     const nextBtn = document.getElementById("pw-next") as HTMLButtonElement;
     nextBtn.disabled = true;