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/feedback/StandardStatePanel.vue.js

@@ -0,0 +1,66 @@
+const __VLS_props = withDefaults(defineProps(), { state: 'READY', retryable: false });
+const __VLS_emit = defineEmits();
+const __VLS_defaults = { state: 'READY', retryable: false };
+const __VLS_ctx = {
+    ...{},
+    ...{},
+    ...{},
+    ...{},
+};
+let __VLS_components;
+let __VLS_intrinsics;
+let __VLS_directives;
+/** @type {__VLS_StyleScopedClasses['ks-state']} */ ;
+/** @type {__VLS_StyleScopedClasses['ks-state']} */ ;
+/** @type {__VLS_StyleScopedClasses['ks-state']} */ ;
+/** @type {__VLS_StyleScopedClasses['ks-state']} */ ;
+/** @type {__VLS_StyleScopedClasses['ks-state']} */ ;
+/** @type {__VLS_StyleScopedClasses['ks-state']} */ ;
+if (__VLS_ctx.state !== 'READY') {
+    __VLS_asFunctionalElement1(__VLS_intrinsics.div, __VLS_intrinsics.div)({
+        ...{ class: "ks-state" },
+        'data-state': (__VLS_ctx.state),
+        role: "status",
+        'aria-busy': (__VLS_ctx.state === 'LOADING' || __VLS_ctx.state === 'PROCESSING'),
+    });
+    /** @type {__VLS_StyleScopedClasses['ks-state']} */ ;
+    __VLS_asFunctionalElement1(__VLS_intrinsics.strong, __VLS_intrinsics.strong)({});
+    (__VLS_ctx.title ?? __VLS_ctx.state);
+    if (__VLS_ctx.message) {
+        __VLS_asFunctionalElement1(__VLS_intrinsics.p, __VLS_intrinsics.p)({});
+        (__VLS_ctx.message);
+    }
+    if (__VLS_ctx.traceId) {
+        __VLS_asFunctionalElement1(__VLS_intrinsics.small, __VLS_intrinsics.small)({});
+        (__VLS_ctx.traceId);
+    }
+    if (__VLS_ctx.retryable) {
+        __VLS_asFunctionalElement1(__VLS_intrinsics.button, __VLS_intrinsics.button)({
+            ...{ onClick: (...[$event]) => {
+                    if (!(__VLS_ctx.state !== 'READY'))
+                        throw 0;
+                    if (!(__VLS_ctx.retryable))
+                        throw 0;
+                    return (__VLS_ctx.$emit('retry'));
+                    // @ts-ignore
+                    [state, state, state, state, state, title, message, message, traceId, traceId, retryable, $emit,];
+                } },
+            type: "button",
+        });
+    }
+    var __VLS_0 = {};
+}
+else {
+    var __VLS_2 = {};
+}
+// @ts-ignore
+var __VLS_1 = __VLS_0, __VLS_3 = __VLS_2;
+// @ts-ignore
+[];
+const __VLS_base = (await import('vue')).defineComponent({
+    __typeEmits: {},
+    __typeProps: {},
+    props: {},
+});
+const __VLS_export = {};
+export default {};