home-assistant: add tuya-device-handlers, disable flaky tests

Update component-packages.nix to include tuya-device-handlers as a
dependency of the tuya integration and add tuya to
supportedComponentsWithTests.

Disable snapshot tests that fail due to nixpkgs-specific issues:
- test_diagnostics.py: entity ordering differs because Python 3.14
  schedules async platform setup differently than 3.13.
- test_device_diagnostics[tdq_9htyiowaf5rtdhrv] and
  test_platform_setup_and_discovery: PyPI sdist translations differ
  from source strings.json ("Power-on behavior" vs "Power on behavior").

pkgs/servers/home-assistant/component-packages.nix

@@ -6527,8 +6527,9 @@
     "tuya" =
       ps: with ps; [
         ha-ffmpeg
+        tuya-device-handlers
         tuya-device-sharing-sdk
-      ]; # missing inputs: tuya-device-handlers
+      ];
     "twentemilieu" =
       ps: with ps; [
         twentemilieu
@@ -8196,6 +8197,7 @@
     "trend"
     "triggercmd"
     "tts"
+    "tuya"
     "twentemilieu"
     "twilio"
     "twinkly"

pkgs/servers/home-assistant/tests.nix

@@ -204,6 +204,11 @@ let
       # TraneConfigFlow doesn't support step reauth
       "tests/components/trane/test_init.py::test_setup_auth_error"
     ];
+    tuya = [
+      # entity ordering in diagnostics is non-deterministic; fixed upstream in
+      # https://github.com/home-assistant/core/pull/164819 (landing in HA 2026.4)
+      "tests/components/tuya/test_diagnostics.py"
+    ];
     youtube = [
       # outdated snapshot
       "tests/components/youtube/test_sensor.py::test_sensor"
@@ -237,6 +242,12 @@ let
       # tries to retrieve file from github
       "test_non_text_stdout_capture"
     ];
+    tuya = [
+      # snapshot mismatches: PyPI sdist translations differ from strings.json
+      # ("Power-on behavior" vs "Power on behavior"); expected to resolve in HA 2026.4
+      "test_device_diagnostics[tdq_9htyiowaf5rtdhrv]"
+      "test_platform_setup_and_discovery"
+    ];
     zeroconf = [
       # multicast socket bind, not possible in the sandbox
       "test_subscribe_discovery"