feat: implement QTTR status tracking and update mechanism

frontend/src/components/members/MembersOverviewSection.vue

@@ -10,7 +10,7 @@
                 </button>
                 <button @click="$emit('create-phone-list')">{{ $t('members.generatePhoneList') }}</button>
                 <button @click="$emit('open-group-photo-crop')">{{ $t('members.groupPhotoCrop') }}</button>
-                <button @click="$emit('update-ratings')" class="btn-update-ratings" :disabled="isUpdatingRatings">
+                <button @click="$emit('update-ratings')" class="btn-update-ratings" :disabled="isUpdatingRatings" :title="ratingsStatus">
                     {{ isUpdatingRatings ? $t('members.updating') : $t('members.updateRatings') }}
                 </button>
                 <button @click="$emit('open-transfer-dialog')" class="btn-transfer">
@@ -244,7 +244,8 @@ export default {
         filteredTestMembersCount: { type: Number, required: true },
         filteredMembersWithPhonesCount: { type: Number, required: true },
         filteredMembersWithEmailsCount: { type: Number, required: true },
-        exportPreviewNames: { type: Array, required: true }
+        exportPreviewNames: { type: Array, required: true },
+        ratingsStatus: { type: String, default: '' }
     },
     emits: [
         'toggle-new-member',

frontend/src/views/MembersView.vue

@@ -3,6 +3,7 @@
         <MembersOverviewSection
             :member-form-is-open="memberFormIsOpen"
             :is-updating-ratings="isUpdatingRatings"
+            :ratings-status="ratingsStatusTooltip"
             :active-members-count="activeMembersCount"
             :test-members-count="testMembersCount"
             :inactive-members-count="inactiveMembersCount"
@@ -795,6 +796,20 @@ export default {
     },
     computed: {
         ...mapGetters(['isAuthenticated', 'currentClub', 'token', 'hasPermission']),
+
+        ratingsStatusTooltip() {
+            const status = this.ratingsStatus;
+            if (!status) return 'QTTR-Status wird geladen.';
+            const lines = [];
+            const last = this.formatQttrStatusDate(status.lastQttrValueChangeAt);
+            lines.push(last ? `Letzte echte QTTR-Wertänderung: ${last}` : 'Bisher keine echte QTTR-Wertänderung erkannt. Erstbefüllungen zählen nicht.');
+            const cutoff = this.formatQttrStatusDate(status.nextQttrCutoff);
+            if (cutoff) lines.push(`Nächster QTTR-Stichtag: ${cutoff.split(',')[0]}.`);
+            const availableFrom = this.formatQttrStatusDate(status.expectedAvailableFrom);
+            const availableUntil = this.formatQttrStatusDate(status.expectedAvailableUntil);
+            if (availableFrom && availableUntil) lines.push(`Voraussichtlich verfügbar: ${availableFrom.split(',')[0]} bis ${availableUntil.split(',')[0]} (myTischtennis veröffentlicht nach einigen Tagen; keine feste Uhrzeit).`);
+            return lines.join('\n');
+        },
         
         activeMembersCount() {
             return this.members.filter(member => member.active && !member.testMembership).length;
@@ -1227,6 +1242,7 @@ export default {
             newAdultReleaseApproved: false,
             newAdultReserveApproved: false,
             isUpdatingRatings: false,
+            ratingsStatus: null,
             showMemberInfo: false,
             showActivitiesModal: false,
             showMemberTtrHistoryDialog: false,
@@ -1281,6 +1297,7 @@ export default {
         await this.loadTrainingGroups();
         await this.loadMemberDataQualityRequirements();
         await this.init();
+        await this.loadRatingsStatus();
     },
     methods: {
         // Dialog Helper Methods
@@ -3029,6 +3046,7 @@ export default {
                 
                 // Mitglieder neu laden um aktualisierte Werte anzuzeigen
                 await this.loadMembers();
+                await this.loadRatingsStatus();
             } catch (error) {
                 console.error(this.$t('members.errorUpdatingRatings'), error);
                 const message = getSafeErrorMessage(error, this.$t('members.errorUpdatingRatings'));
@@ -3037,6 +3055,14 @@ export default {
                 this.isUpdatingRatings = false;
             }
         },
+        async loadRatingsStatus() {
+            if (!this.currentClub) return;
+            try { this.ratingsStatus = (await apiClient.get(`/clubmembers/ratings-status/${this.currentClub}`)).data; }
+            catch (_error) { this.ratingsStatus = null; }
+        },
+        formatQttrStatusDate(value) {
+            return value ? new Intl.DateTimeFormat('de-DE', { dateStyle: 'medium', timeStyle: 'short' }).format(new Date(value)) : null;
+        },
         
         getAge(birthDate) {
             if (!birthDate) return null;