feat: United/DentalHub + Tufts SCO pre-auth, cloud storage search & file thumbnails

- Add United/DentalHub pre-authorization Selenium worker, helpers, backend route/processor/client, and frontend OTP modal + wired button
- Add Tufts SCO pre-authorization Selenium worker, helpers, backend route/processor/client, and frontend OTP modal + wired button
- Fix btnSubmitAuthorization selector for UnitedDH preauth step2
- Fix Tufts SCO preauth step3 to target <span>pre-authorization</span> button
- Cloud storage search: default to "both" mode so patient folder names match on first search
- Cloud storage folder panel: auto-scroll to panel when opened from search results
- Cloud storage files: show inline image thumbnails and PDF badge in file grid

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

apps/Backend/src/services/seleniumTuftsSCOPreAuthClient.ts

@@ -0,0 +1,26 @@
+import axios from "axios";
+
+const SELENIUM_BASE = process.env.SELENIUM_SERVICE_URL || "http://localhost:8000";
+
+export async function forwardToSeleniumTuftsSCOPreAuthAgent(data: any) {
+  const response = await axios.post(`${SELENIUM_BASE}/tuftssco-preauth`, data, {
+    timeout: 30000,
+  });
+  return response.data;
+}
+
+export async function getSeleniumTuftsSCOPreAuthSessionStatus(sessionId: string) {
+  const response = await axios.get(`${SELENIUM_BASE}/session/${sessionId}/status`, {
+    timeout: 10000,
+  });
+  return response.data;
+}
+
+export async function forwardOtpToSeleniumTuftsSCOPreAuthAgent(sessionId: string, otp: string) {
+  const response = await axios.post(
+    `${SELENIUM_BASE}/submit-otp`,
+    { session_id: sessionId, otp },
+    { timeout: 10000 }
+  );
+  return response.data;
+}

apps/Backend/src/services/seleniumUnitedDHPreAuthClient.ts

@@ -0,0 +1,35 @@
+import axios from "axios";
+
+const SELENIUM_BASE = process.env.SELENIUM_SERVICE_URL ?? "http://localhost:5002";
+
+/**
+ * POST /uniteddh-preauth
+ * Returns { status: "started", session_id: "<uuid>" }
+ */
+export async function forwardToSeleniumUnitedDHPreAuthAgent(
+  data: Record<string, any>
+): Promise<{ status: string; session_id: string }> {
+  const resp = await axios.post(`${SELENIUM_BASE}/uniteddh-preauth`, data);
+  return resp.data;
+}
+
+/**
+ * GET /session/{sid}/status
+ */
+export async function getSeleniumUnitedDHPreAuthSessionStatus(
+  sessionId: string
+): Promise<Record<string, any>> {
+  const resp = await axios.get(`${SELENIUM_BASE}/session/${sessionId}/status`);
+  return resp.data;
+}
+
+/**
+ * POST /submit-otp
+ */
+export async function forwardOtpToSeleniumUnitedDHPreAuthAgent(
+  sessionId: string,
+  otp: string
+): Promise<Record<string, any>> {
+  const resp = await axios.post(`${SELENIUM_BASE}/submit-otp`, { session_id: sessionId, otp });
+  return resp.data;
+}