test: add full-stack Playwright integration test infrastructure

Sprint 12 Phase 2: Real integration tests with seed DB
- R__seed_test_data.sql (Flyway repeatable, 7 members, strains, batches, docs, board, events)
- TestResetController (profile-gated per-test DB reset)
- docker-compose.test.yml (self-contained, tmpfs Postgres)
- Dockerfile.playwright (v1.60.0, pre-installed deps)
- 13 integration spec files, 70+ test cases (@smoke + @full)
- seed-constants.ts, selectors.ts, api-client.ts test helpers

cannamanage-frontend/playwright.config.ts

@@ -1,6 +1,7 @@
-import { defineConfig } from "@playwright/test"
 import path from "path"
 
+import { defineConfig } from "@playwright/test"
+
 const authFile = path.join(__dirname, "e2e", ".auth", "admin.json")
 
 export default defineConfig({
@@ -9,7 +10,7 @@ export default defineConfig({
   retries: 0,
   timeout: 90_000,
   use: {
-    baseURL: "http://localhost:3000",
+    baseURL: process.env.BASE_URL || "http://localhost:3000",
     screenshot: "on",
     trace: "on-first-retry",
     navigationTimeout: 60_000,
@@ -22,8 +23,7 @@ export default defineConfig({
     },
     {
       name: "authenticated",
-      testMatch:
-        /authenticated-admin|visual-regression|accessibility/,
+      testMatch: /authenticated-admin|visual-regression|accessibility/,
       dependencies: ["setup"],
       use: {
         storageState: authFile,
@@ -36,6 +36,17 @@ export default defineConfig({
         /functional-flows|full-check|user-story-tests|system-test|staff-management|screenshot-tour|authenticated-tour/,
       use: { browserName: "chromium" },
     },
+    {
+      name: "integration",
+      testMatch: /integration\//,
+      dependencies: ["setup"],
+      use: {
+        storageState: authFile,
+        browserName: "chromium",
+      },
+      timeout: 90_000,
+      expect: { timeout: 15_000 },
+    },
   ],
   outputDir: "./e2e/test-results",
 })