feat: chatbot CDT lookup — SRP quad, 4-digit auto-prefix, quad field to Selenium

- parseSrpCode: recognize "D4341 UL" / "4341 LR" etc., store quadrant in quad field
- matchOne: auto-prefix D for 4-digit inputs like "0120" → D0120
- LLM prompt: keep SRP code and quadrant together as one procedureName entry
- CdtMatch / CdtResult: add quad field, thread through matchedCodes action data
- claim-form.tsx: include quad in chatbot_claim_prefill type and spread to service line
- selenium_claimSubmitWorker.py: pass quad to fill_service_line, select quadrant
  dropdown by index (UR=1, UL=2, LL=3, LR=4) matching MassHealth form structure

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

apps/Backend/src/routes/claims.ts

@@ -825,6 +825,7 @@ router.post(
                 insuranceSiteKey: "DDMA",
                 massddmaUsername: credentials.username,
                 massddmaPassword: credentials.password,
+                providerName: resolvedNpiProvider?.providerName ?? "",
               },
             };
             jobId = enqueueSeleniumJob({

apps/Backend/src/routes/insuranceStatusDDMAClaim.ts

@@ -40,16 +40,20 @@ router.post("/ddma-claim", async (req: Request, res: Response): Promise<any> =>
       });
     }
 
-    // Fetch NPI providers to pick the target provider on the DDMA portal
+    // Use provider from the claim form if set; fall back to Provider #1 (default)
     const npiProviders = await storage.getNpiProvidersByUser(req.user.id);
-    const primaryProvider = npiProviders[0]; // sorted by sortOrder asc, then id asc
+    const primaryProvider = npiProviders[0];
+    const providerName =
+      (claimData.npiProvider?.providerName as string | undefined)?.trim() ||
+      primaryProvider?.providerName ||
+      "";
 
     const enrichedPayload = {
       claim: {
         ...claimData,
         massddmaUsername: credentials.username,
         massddmaPassword: credentials.password,
-        providerName: primaryProvider?.providerName ?? "",
+        providerName,
       },
     };