feat(frontend): Statistik-Seite mit animierten Auswertungen (Modul 27)

Tab-basierte /statistics-Seite (Voelker, Koeniginnen, Bienenstaende,
Varroa, Honig, Futter) mit animierten Balkendiagrammen, Sidebar-Eintrag
und Live-Verifikation ueber alle Tabs sowie Mobile-Breakpoint.

ApiCore-Frontend/src/lib/statistics/api.ts

@@ -0,0 +1,26 @@
+import { apiFetch } from "@/lib/auth/api-client";
+import { ApiaryStats, ColonyStats, FeedingStats, HoneyStats, QueenStats, VarroaStats } from "./types";
+
+export function fetchColonyStats(): Promise<ColonyStats> {
+  return apiFetch<ColonyStats>("/statistics/colonies");
+}
+
+export function fetchQueenStats(): Promise<QueenStats> {
+  return apiFetch<QueenStats>("/statistics/queens");
+}
+
+export function fetchApiaryStats(): Promise<ApiaryStats> {
+  return apiFetch<ApiaryStats>("/statistics/apiaries");
+}
+
+export function fetchVarroaStats(): Promise<VarroaStats> {
+  return apiFetch<VarroaStats>("/statistics/varroa");
+}
+
+export function fetchHoneyStats(): Promise<HoneyStats> {
+  return apiFetch<HoneyStats>("/statistics/honey");
+}
+
+export function fetchFeedingStats(): Promise<FeedingStats> {
+  return apiFetch<FeedingStats>("/statistics/feeding");
+}

ApiCore-Frontend/src/lib/statistics/types.ts

@@ -0,0 +1,51 @@
+export interface ColonyStats {
+  byStatus: { status: string; count: number }[];
+  strengthOverTime: { colonyId: string; date: string; colonyStrength: number }[];
+  lossesByYear: Record<string, number>;
+}
+
+export interface QueenEvaluationAverage {
+  queenId: string;
+  code: string;
+  evaluationCount: number;
+  colonyStrength: number;
+  gentleness: number;
+  combBuild: number;
+  swarmingTendency: number;
+  broodPattern: number;
+  honeyYield: number;
+}
+
+export interface QueenStats {
+  totalActive: number;
+  averageLifespanDays: number | null;
+  evaluationAverages: QueenEvaluationAverage[];
+}
+
+export interface ApiaryStatsEntry {
+  apiaryId: string;
+  name: string;
+  activeColonies: number;
+  lostColonies: number;
+  totalHoneyKg: number;
+  averageHoneyKgPerColony: number;
+}
+
+export type ApiaryStats = ApiaryStatsEntry[];
+
+export interface VarroaStats {
+  measurements: { colonyId: string; date: string; miteCount: number; method: string }[];
+  treatmentCountByColony: { colonyId: string; treatmentCount: number }[];
+}
+
+export interface HoneyStats {
+  totalHarvestKg: number;
+  totalHoneyBatchKg: number;
+  yieldPerYear: Record<string, number>;
+  yieldPerApiary: Record<string, number>;
+}
+
+export interface FeedingStats {
+  byColony: Record<string, number>;
+  bySeason: Record<string, number>;
+}