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/e2e/global-setup.ts

@@ -1,6 +1,9 @@
-import { expect, test as setup } from "@playwright/test"
-import path from "path"
 import fs from "fs"
+import path from "path"
+
+import { expect, test as setup } from "@playwright/test"
+
+import { SEED } from "./seed-constants"
 
 /**
  * Global setup — authenticates as admin and saves the session state
@@ -13,23 +16,41 @@ const authDir = path.join(__dirname, ".auth")
 const authFile = path.join(authDir, "admin.json")
 
 setup("authenticate as admin", async ({ page, context }) => {
-  const baseURL = "http://localhost:3000"
+  const baseURL = process.env.BASE_URL || "http://localhost:3000"
+  const apiUrl = process.env.API_URL || "http://localhost:8080"
+
+  // Use seed credentials (from seed-constants), overridable via env vars
+  const email = process.env.TEST_ADMIN_EMAIL || SEED.admin.email
+  const password = process.env.TEST_ADMIN_PASSWORD || SEED.admin.password
 
   // Ensure .auth directory exists
   if (!fs.existsSync(authDir)) {
     fs.mkdirSync(authDir, { recursive: true })
   }
 
+  // Wait for backend health (up to 60s)
+  let healthy = false
+  for (let i = 0; i < 30; i++) {
+    try {
+      const res = await fetch(`${apiUrl}/actuator/health`)
+      if (res.ok) {
+        healthy = true
+        break
+      }
+    } catch {
+      /* retry */
+    }
+    await new Promise((r) => setTimeout(r, 2000))
+  }
+  if (!healthy) throw new Error("Backend health check failed after 60s")
+
   // Navigate to login page
   await page.goto(`${baseURL}/login`)
   await page.waitForLoadState("domcontentloaded")
 
   // Fill credentials and submit
-  await page.fill('input[name="email"], input[type="email"]', "admin@test.de")
-  await page.fill(
-    'input[name="password"], input[type="password"]',
-    "test123"
-  )
+  await page.fill('input[name="email"], input[type="email"]', email)
+  await page.fill('input[name="password"], input[type="password"]', password)
   await page.click('button[type="submit"]')
 
   // Wait for successful redirect away from login