rework process flow, compact contact cards, add GKV autocomplete

remove sprechstunde_absolviert as separate step, merge diagnosis +
dringlichkeitscode into erstgespräch form, add 116117 hint, fix TSS
wording, make process steps expandable/collapsible, align advance
buttons right, compact contact list with status-encoded icon buttons,
add delete button on kontaktversuche, add GKV krankenkasse autocomplete
with datalist, add deleteKontakt hook

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

src/features/onboarding/components/onboarding-form.tsx

@@ -9,6 +9,7 @@ import { getDb } from "@/shared/db/client";
 import type { ProzessSchritt } from "@/shared/db/schema";
 import { dbExec } from "@/shared/hooks/use-db";
 import { PROZESS_SCHRITTE } from "@/shared/lib/constants";
+import { GKV_KASSEN } from "@/shared/lib/gkv-kassen";
 
 export function OnboardingForm() {
 	const navigate = useNavigate();
@@ -128,11 +129,17 @@ export function OnboardingForm() {
 								<Label htmlFor="krankenkasse">Krankenkasse</Label>
 								<Input
 									id="krankenkasse"
+									list="gkv-kassen"
 									value={field.state.value}
 									onBlur={field.handleBlur}
 									onChange={(e) => field.handleChange(e.target.value)}
-									placeholder="TK"
+									placeholder="z.B. Techniker Krankenkasse"
 								/>
+								<datalist id="gkv-kassen">
+									{GKV_KASSEN.map((k) => (
+										<option key={k} value={k} />
+									))}
+								</datalist>
 								<FieldErrors errors={field.state.meta.errors} />
 							</div>
 						)}