fix: repair the Colab cell edit and point the clear test at the split resolver

Two CI failures, both mine to fix.

The warning I added to the Colab ASR cell used \n escapes inside the notebook
JSON, and they landed as real newlines, so the cell's Python had an
unterminated string and tests/test_colab_asr_setup.py could not exec it. The
block prints line by line now, with no escapes to get wrong.

test_tauri_log_clear_reports_truncate_failure patched _tauri_log_candidates,
but #1925 moved Clear onto _tauri_plugin_log_candidates, so the patch no longer
reached the code under test and the real resolver was consulted instead. It
passed on a machine with a shell log on disk and failed on a clean runner.
Patches both halves, matching the fixture in test_tauri_log_clear.py.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017ypcgSsh5j2PEonSJiAU1S

notebooks/OmniVoice_Studio_Colab.ipynb

@@ -682,12 +682,12 @@
     "try:\n",
     "    import ctranslate2  # noqa: F401\n",
     "except Exception as _exc:\n",
-    "    print(\n",
-    "        \"\n⚠️  CTranslate2 is not importable here, so the backend will fall back\"\n",
-    "        \"\n    to its PyTorch Whisper default and download that model separately.\"\n",
-    "        f\"\n    Reason: {_exc}\"\n",
-    "        \"\n    Re-run the cuDNN 8 setup cell above before continuing.\"\n",
-    "    )\n"
+    "    print(\"\")\n",
+    "    print(\"WARNING: CTranslate2 is not importable here, so the backend will\")\n",
+    "    print(\"         fall back to its PyTorch Whisper default and download\")\n",
+    "    print(\"         that model separately - several more GB.\")\n",
+    "    print(f\"         Reason: {_exc}\")\n",
+    "    print(\"         Re-run the cuDNN 8 setup cell above before continuing.\")\n"
    ]
   },
   {

tests/test_destructive_cleanup.py

@@ -114,6 +114,14 @@ async def test_tauri_log_clear_reports_truncate_failure(monkeypatch, tmp_path, a
     log = tmp_path / "webview.log"
     log.write_text("data", encoding="utf-8")
     monkeypatch.setattr(system, "_tauri_log_candidates", lambda: [str(log)])
+    # Clear now goes through the plugin-log half only, so patching the
+    # composite alone no longer reaches it. Patching both keeps this honest
+    # against the pre-split code too; without it the real resolver is
+    # consulted and the result depends on whether the machine running the
+    # test happens to have a shell log on disk.
+    monkeypatch.setattr(
+        system, "_tauri_plugin_log_candidates", lambda: [str(log)], raising=False
+    )
     monkeypatch.setattr(
         system,
         "_truncate_file",