Implement rec - Phase 4 complete

tests/services/test_prompt_store.py

@@ -4,6 +4,7 @@ import pytest
 
 from transcription.config import Settings
 from transcription.errors import ErrorCategory
+from transcription.services.errors import PromptLoadError
 from transcription.services.prompts import PromptStore
 from transcription.services.prompts import PromptStoreError
 
@@ -79,6 +80,13 @@ def test_prompt_creation_and_empty_content_are_rejected(prompt_store):
     assert empty.value.category == ErrorCategory.VALIDATION
 
 
+def test_prompt_store_failures_are_catchable_as_prompt_load_errors(prompt_store):
+    store, _ = prompt_store
+
+    with pytest.raises(PromptLoadError):
+        store.read_prompt("missing.md")
+
+
 def test_recovery_requires_a_backup(prompt_store):
     store, _ = prompt_store