fix(admin): G2 — error/success handling in AdminSupplierPricesView save

axios.patch теперь в try/catch с extractErrorMessage() helper. Per-row
ошибки — reactive errorMessages: Record<number, string> отображаются как
v-icon mdi-alert-circle с v-tooltip рядом с кнопкой «Сохранить».
Success — v-snackbar (3s timeout, color=success, bottom-right) с именем
поставщика.

Retry на той же строке очищает предыдущий error перед новым axios.patch.

load() тоже обёрнут — fetchError ref + v-alert warning сверху таблицы.

+3 Vitest specs (save error / save success / retry clears error).
Регрессий 0.

Closes audit ID G2 from docs/superpowers/specs/2026-05-15-portal-audit-design.md.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/resources/js/views/admin/AdminSupplierPricesView.vue

@@ -1,6 +1,20 @@
 <template>
     <div class="admin-supplier-prices-view">
         <h1 class="text-h4 mb-6">Цены поставщиков (закупка)</h1>
+
+        <v-alert
+            v-if="fetchError"
+            type="warning"
+            variant="tonal"
+            class="mb-4"
+            density="compact"
+            data-testid="suppliers-fetch-error"
+            closable
+            @click:close="fetchError = null"
+        >
+            {{ fetchError }}
+        </v-alert>
+
         <v-card elevation="1">
             <v-data-table :headers="headers" :items="suppliers" density="comfortable" class="numeric-tnum">
                 <template #[`item.cost_rub`]="{ item }">
@@ -38,27 +52,52 @@
                     />
                 </template>
                 <template #[`item.actions`]="{ item }">
-                    <v-btn size="small" color="primary" :loading="!!saving[item.id]" @click="save(item)">
-                        Сохранить
-                    </v-btn>
+                    <div class="d-flex flex-column align-end ga-1">
+                        <v-btn size="small" color="primary" :loading="!!saving[item.id]" @click="save(item)">
+                            Сохранить
+                        </v-btn>
+                        <v-tooltip v-if="errorMessages[item.id]" location="left">
+                            <template #activator="{ props: tooltipProps }">
+                                <v-icon
+                                    v-bind="tooltipProps"
+                                    color="error"
+                                    size="small"
+                                    :data-testid="`supplier-error-${item.id}`"
+                                >
+                                    mdi-alert-circle
+                                </v-icon>
+                            </template>
+                            <span>{{ errorMessages[item.id] }}</span>
+                        </v-tooltip>
+                    </div>
                 </template>
             </v-data-table>
         </v-card>
+
+        <v-snackbar
+            v-model="successToastOpen"
+            :timeout="3000"
+            color="success"
+            location="bottom right"
+            data-testid="supplier-success-toast"
+        >
+            {{ successToastText }}
+        </v-snackbar>
     </div>
 </template>
 
 <script setup lang="ts">
 import { ref, onMounted, reactive } from 'vue';
 import axios from 'axios';
+import { extractErrorMessage } from '../../api/client';
 
 /**
- * SaaS-admin → Цены поставщиков (Plan 4 Task 10).
+ * SaaS-admin → Цены поставщиков (Plan 4 Task 10, Sprint 1 G2 error handling).
  *
  * Backend: AdminSuppliersController (GET/PATCH).
  * Палитра Forest + JetBrains Mono для tnum-цифр.
  *
- * defineExpose ниже — для Vitest unit-тестов (`load`/`save`/`suppliers`/
- * `saving`). На прод-сборку это не влияет.
+ * defineExpose ниже — для Vitest unit-тестов.
  */
 
 interface SupplierRow {
@@ -72,6 +111,10 @@ interface SupplierRow {
 
 const suppliers = ref<SupplierRow[]>([]);
 const saving = reactive<Record<number, boolean>>({});
+const errorMessages = reactive<Record<number, string>>({});
+const fetchError = ref<string | null>(null);
+const successToastOpen = ref(false);
+const successToastText = ref('');
 
 const headers = [
     { title: 'Code', key: 'code', sortable: false, width: 80 },
@@ -83,18 +126,28 @@ const headers = [
 ];
 
 async function load(): Promise<void> {
-    const { data } = await axios.get('/api/admin/suppliers');
-    suppliers.value = data.data;
+    fetchError.value = null;
+    try {
+        const { data } = await axios.get('/api/admin/suppliers');
+        suppliers.value = data.data;
+    } catch (err) {
+        fetchError.value = extractErrorMessage(err, 'Не удалось загрузить список поставщиков.');
+    }
 }
 
 async function save(s: SupplierRow): Promise<void> {
     saving[s.id] = true;
+    delete errorMessages[s.id]; // очистить предыдущую ошибку перед retry
     try {
         await axios.patch(`/api/admin/suppliers/${s.id}`, {
             cost_rub: s.cost_rub,
             quality_score: s.quality_score,
             is_active: s.is_active,
         });
+        successToastText.value = `Сохранено: ${s.name} (${s.code}).`;
+        successToastOpen.value = true;
+    } catch (err) {
+        errorMessages[s.id] = extractErrorMessage(err, 'Не удалось сохранить изменения.');
     } finally {
         saving[s.id] = false;
     }
@@ -102,7 +155,7 @@ async function save(s: SupplierRow): Promise<void> {
 
 onMounted(load);
 
-defineExpose({ load, save, suppliers, saving });
+defineExpose({ load, save, suppliers, saving, errorMessages, fetchError, successToastOpen, successToastText });
 </script>
 
 <style scoped>

app/tests/Frontend/AdminSupplierPricesView.spec.ts

@@ -1,4 +1,4 @@
-import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
 import { mount } from '@vue/test-utils';
 import { createVuetify } from 'vuetify';
 import axios from 'axios';
@@ -80,3 +80,91 @@ describe('AdminSupplierPricesView', () => {
         }
     });
 });
+
+describe('AdminSupplierPricesView error handling (Sprint 1 G2)', () => {
+    beforeEach(() => {
+        // axios.isAxiosError is auto-mocked as vi.fn() by vi.mock('axios').
+        // We need it to return true so extractErrorMessage() can read response.data.message.
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (axios.isAxiosError as any).mockReturnValue(true);
+    });
+    afterEach(() => {
+        // Cleanup mockReturnValue to prevent leak into other describe blocks (review I-1).
+        vi.clearAllMocks();
+    });
+
+    it('save() shows per-row errorMessage when axios.patch rejects', async () => {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (axios.get as any).mockResolvedValue({
+            data: {
+                data: [
+                    { id: 1, code: 'B1', name: 'Supplier 1', cost_rub: '120.00', quality_score: '8.50', is_active: true },
+                ],
+            },
+        });
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (axios.patch as any).mockRejectedValue({
+            response: { status: 422, data: { message: 'cost_rub must be non-negative' } },
+        });
+        const wrapper = mount(AdminSupplierPricesView, { global: { plugins: [vuetify] } });
+        await new Promise((r) => setTimeout(r, 50));
+        const row = { id: 1, code: 'B1', name: 'Supplier 1', cost_rub: '-5.00', quality_score: '8.50', is_active: true };
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        await (wrapper.vm as any).save(row);
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        const vm = wrapper.vm as any;
+        expect(vm.errorMessages[1]).toContain('cost_rub');
+        expect(vm.saving[1]).toBe(false);
+    });
+
+    it('save() shows successMessage on 200', async () => {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (axios.get as any).mockResolvedValue({
+            data: {
+                data: [
+                    { id: 2, code: 'B2', name: 'Supplier 2', cost_rub: '100.00', quality_score: '9.00', is_active: true },
+                ],
+            },
+        });
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (axios.patch as any).mockResolvedValue({ data: { ok: true } });
+        const wrapper = mount(AdminSupplierPricesView, { global: { plugins: [vuetify] } });
+        await new Promise((r) => setTimeout(r, 50));
+        const row = { id: 2, code: 'B2', name: 'Supplier 2', cost_rub: '110.00', quality_score: '9.00', is_active: true };
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        await (wrapper.vm as any).save(row);
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        const vm = wrapper.vm as any;
+        expect(vm.successToastOpen).toBe(true);
+        expect(vm.successToastText).toContain('Supplier 2');
+        expect(vm.errorMessages[2]).toBeUndefined();
+        expect(vm.saving[2]).toBe(false);
+    });
+
+    it('save() clears previous error on successful retry', async () => {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (axios.get as any).mockResolvedValue({
+            data: { data: [{ id: 3, code: 'B3', name: 'Supplier 3', cost_rub: '100.00', quality_score: '8.00', is_active: true }] },
+        });
+        // First call fails
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (axios.patch as any).mockRejectedValueOnce({
+            response: { status: 500, data: { message: 'transient' } },
+        });
+        // Second call succeeds
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (axios.patch as any).mockResolvedValueOnce({ data: { ok: true } });
+
+        const wrapper = mount(AdminSupplierPricesView, { global: { plugins: [vuetify] } });
+        await new Promise((r) => setTimeout(r, 50));
+        const row = { id: 3, code: 'B3', name: 'Supplier 3', cost_rub: '100.00', quality_score: '8.00', is_active: true };
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        await (wrapper.vm as any).save(row);
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        expect((wrapper.vm as any).errorMessages[3]).toContain('transient');
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        await (wrapper.vm as any).save(row);
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        expect((wrapper.vm as any).errorMessages[3]).toBeUndefined();
+    });
+});