PR 6: Database migration validation - fresh/upgrade test complete

✅ Database Setup:
- Created PostgreSQL kartselldb with kartsell user
- SSH port forward established (localhost:5432 → 178.104.200.7:5432)

✅ DbMigrator Fixes:
- Fixed migration path discovery (AppContext.BaseDirectory fallback)
- Added empty variable dictionary to suppress DbUp preprocessing
- Fixed PostgreSQL dollar quoting conflict ($policy$ → $$)

✅ Migration Results:
- All 21 migrations executed successfully
- Schema versions journal created and tracked
- 21 scripts processed in order, no rollback needed

Status: FRESH DATABASE DEPLOYMENT SUCCESSFUL
- kartselldb fully initialized with v16 schema
- Ready for application startup

Next: Deploy application and run integration tests

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

frontend/src/shared/ui/adapter/native/NativeMultiSelectAdapter.vue.js

@@ -0,0 +1,58 @@
+const props = withDefaults(defineProps(), { modelValue: () => [] });
+const emit = defineEmits();
+function update(event) {
+    const selected = Array.from(event.target.selectedOptions).map(x => {
+        const option = props.options[Number(x.value)];
+        return option?.value ?? null;
+    });
+    emit('update:modelValue', selected);
+}
+const __VLS_defaults = { modelValue: () => [] };
+const __VLS_ctx = {
+    ...{},
+    ...{},
+    ...{},
+    ...{},
+    ...{},
+};
+let __VLS_components;
+let __VLS_intrinsics;
+let __VLS_directives;
+__VLS_asFunctionalElement1(__VLS_intrinsics.label, __VLS_intrinsics.label)({
+    ...{ class: "ks-field" },
+});
+/** @type {__VLS_StyleScopedClasses['ks-field']} */ ;
+if (__VLS_ctx.label) {
+    __VLS_asFunctionalElement1(__VLS_intrinsics.span, __VLS_intrinsics.span)({});
+    (__VLS_ctx.label);
+    if (__VLS_ctx.required) {
+        __VLS_asFunctionalElement1(__VLS_intrinsics.b, __VLS_intrinsics.b)({
+            'aria-hidden': "true",
+        });
+    }
+}
+__VLS_asFunctionalElement1(__VLS_intrinsics.select, __VLS_intrinsics.select)({
+    ...{ onChange: (__VLS_ctx.update) },
+    multiple: true,
+    disabled: (__VLS_ctx.disabled),
+    required: (__VLS_ctx.required),
+});
+for (const [option, index] of __VLS_vFor((__VLS_ctx.options))) {
+    __VLS_asFunctionalElement1(__VLS_intrinsics.option, __VLS_intrinsics.option)({
+        key: (`${index}:${option.label}`),
+        value: (index),
+        disabled: (option.disabled),
+        selected: (__VLS_ctx.modelValue.includes(option.value)),
+    });
+    (option.label);
+    // @ts-ignore
+    [label, label, required, required, update, disabled, options, modelValue,];
+}
+// @ts-ignore
+[];
+const __VLS_export = (await import('vue')).defineComponent({
+    __typeEmits: {},
+    __typeProps: {},
+    props: {},
+});
+export default {};