fix back button behavior in studvw and lvverwaltung

public/js/components/LVVerwaltung/LVVerwaltung.js

@@ -124,6 +124,10 @@ export default {
 					? `${this.stg}/${this.semester}`
 					: this.stg;
 			}
+			else
+			{
+				this.selectedStudiengang = '';
+			}
 			this.filter = filter;
 		},
 		handleRowClicked(data)
@@ -163,6 +167,7 @@ export default {
 			const routeName = this.filter.emp ? 'byEmp' : 'byStg';
 			const params = { stg };
 
+			params.semester = '';
 			if (semester !== null)
 				params.semester = semester;
 			if (studiensemester_kurzbz)
@@ -281,7 +286,7 @@ export default {
 						<button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" :aria-label="$p.t('ui/schliessen')"></button>
 					</div>
 					<stv-verband :preselectedKey="selectedStudiengang" :endpoint="endpoint" @select-verband="onSelectVerband" class="col" style="height:0%"></stv-verband>
-					<stv-studiensemester v-model:studiensemester-kurzbz="selectedStudiensemester" @update:studiensemester-kurzbz="studiensemesterChanged"></stv-studiensemester>
+					<stv-studiensemester vnull-model:studiensemester-kurzbz="selectedStudiensemester" @update:studiensemester-kurzbz="studiensemesterChanged"></stv-studiensemester>
 				</nav>
 				
 				<main class="col-md-8 ms-sm-auto col-lg-9 col-xl-10">

public/js/components/Stv/Studentenverwaltung.js

@@ -356,6 +356,18 @@ export default {
 					});
 				}
 			}
+			else
+			{
+				this.studiengangKz = undefined;
+				this.studiengangKuerzel = '';
+				if(['index', 'studiensemester'].includes(this.$route.name))
+				{
+					if(this.$refs?.stvList?.$refs?.table?.tabulator)
+					{
+						this.$refs.stvList.$refs.table.tabulator.setData([]);
+					}
+				}
+			}
 		},
 		onSearch(e) {
 			const searchsettings = { ...this.$refs.searchbar.searchsettings };
@@ -585,7 +597,7 @@ export default {
 					<div class="offcanvas-header justify-content-end px-1 d-md-none">
 						<button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" :aria-label="$p.t('ui/schliessen')"></button>
 					</div>
-					<stv-verband :preselectedKey="'' + studiengangKz" :endpoint="verbandEndpoint" @select-verband="onSelectVerband" class="col" style="height:0%"></stv-verband>
+					<stv-verband :preselectedKey="studiengangKz ? '' + studiengangKz : null" :endpoint="verbandEndpoint" @select-verband="onSelectVerband" class="col" style="height:0%"></stv-verband>
 					<stv-studiensemester v-model:studiensemester-kurzbz="studiensemesterKurzbz" @update:studiensemester-kurzbz="studiensemesterChanged"></stv-studiensemester>
 				</nav>
 				<main class="col-md-8 ms-sm-auto col-lg-9 col-xl-10">

public/js/components/Stv/Studentenverwaltung/Verband.js

@@ -16,14 +16,17 @@ export default {
 	inject: {
 		$reloadList: {
 			from: '$reloadList',
-			required: true
+			default: () => {}
 		},
 		currentSemester: {
 			from: 'currentSemester',
 			required: true
 		},
 		appConfig: {
-			from: 'appConfig'
+			from: 'appConfig',
+			default: {
+				number_displayed_past_studiensemester: 5
+			}
 		}
 	},
 	emits: [
@@ -208,22 +211,25 @@ export default {
 			if (!currentNode)
 				return;
 
-			const currentSelectedKey = Object.keys(this.selectedKey).find(Boolean);
-			if (currentSelectedKey) {
-				if (currentSelectedKey == currentKey)
-					return;
-				/**
-				 * Do not select a new entry if the current is a child of the new one.
-				 * This happens if a child entry of a new stg is selected and the router
-				 * tries to select the stg root entry (because subtrees do not have
-				 * routes yet)
-				 */
-				const isChild = this.findNodeByKey(
-					currentSelectedKey,
-					currentNode.children
-				);
-				if (isChild)
-					return;
+			if(this.selectedKey)
+			{
+				const currentSelectedKey = Object.keys(this.selectedKey).find(Boolean);
+				if (currentSelectedKey) {
+					if (currentSelectedKey == currentKey)
+						return;
+					/**
+					 * Do not select a new entry if the current is a child of the new one.
+					 * This happens if a child entry of a new stg is selected and the router
+					 * tries to select the stg root entry (because subtrees do not have
+					 * routes yet)
+					 */
+					const isChild = this.findNodeByKey(
+						currentSelectedKey,
+						currentNode.children || []
+					);
+					if (isChild)
+						return;
+				}
 			}
 
 			for (let i = 1; i < parts.length; i++)