feat: Extend React/Java app to match Lua functionality

Backend:
- Add Pretreatment record for pre-treatment data
- Extend Sample with pretreatment, clinicalExamDate, internalNote
- Extend TherapyRecommendation with detail fields (count, duration, dosage, location)
- Add startvacVaccination and noAntibioticTreatment flags
- Add null-safety defaults for MongoDB compatibility

Frontend:
- Add pretreatment fields to SampleRegistrationPage
- Add special pathogens section to AnamnesisPage
- Add therapy detail pickers to TherapyPage
- Improve AntibiogramPage: full text labels, centered headers
- Fix AdminDashboardPage TypeScript error in chart tooltip

Styling:
- Enlarge matrix buttons for S/I/R text
- Add matrix-col class for centered table columns

frontend/src/pages/AntibiogramPage.tsx

@@ -167,9 +167,9 @@ export default function AntibiogramPage() {
                 <thead>
                   <tr>
                     <th>Antibiotikum</th>
-                    <th>S</th>
-                    <th>I</th>
-                    <th>R</th>
+                    <th className="matrix-col">Sensibel</th>
+                    <th className="matrix-col">Intermediär</th>
+                    <th className="matrix-col">Resistent</th>
                   </tr>
                 </thead>
                 <tbody>
@@ -180,7 +180,7 @@ export default function AntibiogramPage() {
                         <small className="table-subtext">{antibiotic.code ?? "ANT"}</small>
                       </td>
                       {(["SENSITIVE", "INTERMEDIATE", "RESISTANT"] as SensitivityResult[]).map((result) => (
-                        <td key={result}>
+                        <td key={result} className="matrix-col">
                           <button
                             type="button"
                             className={`matrix-button ${
@@ -191,7 +191,7 @@ export default function AntibiogramPage() {
                             onClick={() => updateResult(group.referenceQuarter, antibiotic.businessKey, result)}
                             disabled={!sample.antibiogramEditable}
                           >
-                            {result === "SENSITIVE" ? "S" : result === "INTERMEDIATE" ? "I" : "R"}
+                            {result === "SENSITIVE" ? "Sensibel" : result === "INTERMEDIATE" ? "Intermediär" : "Resistent"}
                           </button>
                         </td>
                       ))}