feat: check OLLAMA_HOST reachability before starting translationv1.6

Non-blocking QThread check hits /api/tags on the resolved ollama host
before launching TranslationWorker. Shows QMessageBox.warning() if
unreachable; proceeds silently if reachable. Adds ollama_host field to
Config with env-var fallback to http://localhost:11434.

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

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/test_ollama_check_worker.py b/tests/test_ollama_check_worker.py
new file mode 100644
index 0000000..3c575db
--- /dev/null
+++ b/tests/test_ollama_check_worker.py
@@ -0,0 +1,11 @@
+from workers.ollama_check_worker import OllamaCheckWorker
+
+
+def test_worker_appends_api_tags_path():
+    w = OllamaCheckWorker("http://localhost:11434")
+    assert w._url == "http://localhost:11434/api/tags"
+
+
+def test_worker_strips_trailing_slash():
+    w = OllamaCheckWorker("http://localhost:11434/")
+    assert w._url == "http://localhost:11434/api/tags"