feat: improve CCA preauth cell filling, implants category, preauth no recording

- Selenium: bulletproof Wait→Click→Clear→Type→Verify for tooth, billed amt cells
- Selenium: fix billed amt to click td[23] (correct column) to trigger edit mode
- Selenium: skip tentative date (auto-filled by page after tooth entry)
- Frontend: add Implants category with Implant/Abut/Crown, Fixture, Abutment, Crown buttons (D6010/D6057/D6058)
- Frontend: pdf-preview-modal renders PNG screenshots as <img> instead of PDF iframe
- Backend: CCA preauth route creates claim record if none exists
- Backend: CCA preauth processor saves authNumber into claimNumber column after submission

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

apps/Frontend/src/utils/procedureCombos.ts

@@ -233,6 +233,28 @@ export const PROCEDURE_COMBOS: Record<
     codes: ["D5214"],
   },
 
+  // Implants
+  implantFull: {
+    id: "implantFull",
+    label: "Implant/Abut/Crown",
+    codes: ["D6010", "D6057", "D6058"],
+  },
+  implantFixture: {
+    id: "implantFixture",
+    label: "Implant Fixture",
+    codes: ["D6010"],
+  },
+  implantAbutment: {
+    id: "implantAbutment",
+    label: "Abutment",
+    codes: ["D6057"],
+  },
+  implantCrown: {
+    id: "implantCrown",
+    label: "Implant Crown",
+    codes: ["D6058"],
+  },
+
   // Endodontics
   rctAnterior: {
     id: "rctAnterior",
@@ -357,6 +379,7 @@ export const COMBO_CATEGORIES: Record<
     "plResin",
     "plCast",
   ],
+  Implants: ["implantFull", "implantFixture", "implantAbutment", "implantCrown"],
   Endodontics: ["rctAnterior", "rctPremolar", "rctMolar", "postCore", "coreBU"],
   Prosthodontics: ["crown"],
   Periodontics: ["deepCleaning"],