fix(GRO-1489): resolve 7 lint errors blocking dev CI

- Remove unused gte, lt, ne imports from cascade.ts
- Rename originalEndTime → _originalEndTime in detectAndCascadeOverrun params
- Rename originalStartTime/newStartTime → _originalStartTime/_newStartTime in isOverrun params
- Remove unused petCoatType assignment in book.ts availability route
- Align x-large → xlarge in Book.tsx size option value and duration display

Unblocks: GRO-1481 promotion (PR #428)

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/e2e/playwright.config.ts

@@ -19,7 +19,7 @@ export default defineConfig({
   reporter: process.env.CI ? "github" : "list",
 
   use: {
-    baseURL: "http://localhost:8080",
+    baseURL: process.env.PLAYWRIGHT_BASE_URL ?? "http://localhost:8080",
     trace: "on-first-retry",
     screenshot: "only-on-failure",
     serviceWorkers: "block",