fix: Configure Wallaby integration tests for GitHub CI

The Wallaby integration tests were timing out in CI. This adds proper
configuration for running browser tests in the CI environment.

Changes:
- Start ChromeDriver explicitly in the background on port 4444
- Pass CHROMEDRIVER_URL environment variable to tests
- Add chromedriver_base_url configuration to use env var if available
- Increase test timeout to 60 seconds for integration tests
- Add additional Chrome flags for better CI stability:
  - --disable-setuid-sandbox
  - --disable-extensions
  - --disable-background-timer-throttling
  - --disable-backgrounding-occluded-windows
  - --disable-renderer-backgrounding

These changes ensure ChromeDriver is properly started and accessible
in the CI environment, preventing connection timeouts.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

.github/workflows/elixir.yaml

@@ -120,6 +120,12 @@ jobs:
         uses: nanasess/setup-chromedriver@v2
         # Note: Using latest stable version instead of pinned version for better compatibility
 
+      # Step: Start ChromeDriver in the background
+      - name: Start ChromeDriver
+        run: |
+          chromedriver --port=4444 --url-base=/wd/hub &
+          sleep 2
+
       # Step: Execute the tests.
       - name: Run tests
         run: mix test
@@ -132,3 +138,4 @@ jobs:
           # Increase timeouts for browser tests in CI environment
           WALLABY_SCREENSHOT_ON_FAILURE: true
           WALLABY_MAX_WAIT_TIME: 30000
+          CHROMEDRIVER_URL: http://localhost:4444/wd/hub

config/test.exs

@@ -95,6 +95,11 @@ config :wallaby,
       "--no-sandbox",
       "--disable-dev-shm-usage",
       "--disable-gpu",
+      "--disable-setuid-sandbox",
+      "--disable-extensions",
+      "--disable-background-timer-throttling",
+      "--disable-backgrounding-occluded-windows",
+      "--disable-renderer-backgrounding",
       "--window-size=1280,720"
     ]
   ],
@@ -104,4 +109,6 @@ config :wallaby,
   # Increase default timeouts for CI environment
   max_wait_time: "WALLABY_MAX_WAIT_TIME" |> System.get_env("5000") |> String.to_integer(),
   # Pool configuration for concurrent tests
-  pool_size: 1
+  pool_size: 1,
+  # Use ChromeDriver URL from environment if available (for CI)
+  chromedriver_base_url: System.get_env("CHROMEDRIVER_URL")

test/integration/historical_loading_integration_test.exs

@@ -31,6 +31,7 @@ defmodule AprsmeWeb.HistoricalLoadingIntegrationTest do
 
   describe "historical packet loading on page load" do
     @describetag :integration
+    @describetag timeout: 60_000
     feature "displays historical packets immediately after map loads", %{session: session} do
       # Create test packets with known positions
       now = DateTime.utc_now()