Publish Vulpes Preview 15 sources for desktop, Android and Tundra

Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.

tools/test-welcome-languages.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+"""Verify welcome translations against Gaia settings in the isolated PC host."""
+import importlib.util
+import json
+import time
+from pathlib import Path
+from marionette_client import Client
+
+ROOT = Path(__file__).resolve().parents[1]
+spec = importlib.util.spec_from_file_location("probe", ROOT / "tools/probe-desktop.py")
+probe = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(probe)
+results = {}
+with Client(2857) as client:
+    probe.register(client)
+    def evaluate(code):
+        response = probe.evaluate(client, "search", code, "/newtab.html")
+        assert "error" not in response, response
+        return response.get("value")
+
+    probe.evaluate(client, "system", 'await VulpesCompat.call("apps.launch",{manifestURL:"http://search.localhost:8765/manifest.webapp"});return true;')
+    time.sleep(2)
+    previous = evaluate('return (await VulpesCompat.call("settings.get",{key:"language.current"})).value;')
+    try:
+        for language, expected in [("fr", "fr"), ("fr-BE", "fr"), ("fr-CA", "fr"), ("en-US", "en"), ("de", "en"), ("fr", "fr")]:
+            evaluate('await VulpesCompat.call("settings.set",{values:{"language.current":' + json.dumps(language) + '}});return true;')
+            for attempt in range(40):
+                state = evaluate('const d=document.getElementById("vulpes-local-home")?.contentDocument;return {language:d?.documentElement.lang,heading:d?.querySelector("h1")?.textContent};')
+                if state and state.get("language") == expected:
+                    break
+                time.sleep(.1)
+            assert state["language"] == expected, (language, state)
+            results[language] = state
+    finally:
+        evaluate('await VulpesCompat.call("settings.set",{values:{"language.current":' + json.dumps(previous) + '}});return true;')
+(ROOT / "logs/welcome-languages.json").write_text(json.dumps(results, ensure_ascii=False, indent=2) + "\n")
+print(json.dumps(results, ensure_ascii=False, indent=2))