fix: remove as-any casts, type Dashboard data properly

- Route handlers: add exhaustive return after error checks so TypeScript
  narrows the union and result properties are accessible without casts
- attendance.service: use Prisma.attendanceGetPayload for included relations
- projects.service: remove unnecessary cast on orders relation
- Dashboard.tsx: replace Record<string,any> with proper DashData interface

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/routes/admin/projects.ts

@@ -173,7 +173,7 @@ export default async function projectsRoutes(
       const body = request.body as Record<string, unknown>;
       const deleteFiles = !!body?.delete_files;
       const result = await deleteProject(id, deleteFiles);
-      if (result && "error" in result) {
+      if ("error" in result) {
         if (result.error === "not_found")
           return error(reply, "Projekt nenalezen", 404);
         if (result.error === "has_order")
@@ -182,6 +182,7 @@ export default async function projectsRoutes(
             "Nelze smazat projekt propojený s objednávkou. Nejdříve smažte objednávku.",
             400,
           );
+        return error(reply, "Neznámá chyba", 500);
       }
 
       await logAudit({
@@ -190,7 +191,7 @@ export default async function projectsRoutes(
         action: "delete",
         entityType: "project",
         entityId: id,
-        description: `Smazán projekt ${(result as any).name}`,
+        description: `Smazán projekt ${result.name}`,
       });
       return success(reply, null, 200, "Projekt smazán");
     },