fix: make API client base URL configurable for green-blue deployments

Previously, all browser clients (AdminDashboardClient, InquiryBrowserClient, etc.)
had hardcoded BaseAddress of http://localhost:5001/taxbaik/api/. This caused
issues when implementing green-blue deployments where ports alternate between
5001/5002.

Changes:
- Add ApiClient:BaseUrl configuration in appsettings.json (default: 5001)
- Update Program.cs to read configuration instead of hardcoding
- All 6 browser clients now use dynamic configuration
- Deployment script prepared for green-blue support (port can be injected via
  ApiClient__BaseUrl environment variable)

Deployment Note:
- For green-blue: Set ApiClient__BaseUrl environment variable before starting
  the service on the alternate port (5002)
- Nginx still routes /taxbaik to the active instance
- Supports zero-downtime deployments

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

playwright.config.ts

@@ -18,8 +18,20 @@ export default defineConfig({
   },
   projects: [
     {
-      name: 'chromium',
+      name: 'Desktop Chrome',
       use: { ...devices['Desktop Chrome'] }
+    },
+    {
+      name: 'iPhone 12',
+      use: { ...devices['iPhone 12'] }
+    },
+    {
+      name: 'iPad Pro',
+      use: { ...devices['iPad Pro'] }
+    },
+    {
+      name: 'Galaxy S9+',
+      use: { ...devices['Galaxy S9+'] }
     }
   ]
 });