Fix: strip non-ASCII chars before sending to llama-server

app.py

@@ -78,6 +78,12 @@ def _read_file(path: str) -> str:
     return p.read_text(encoding="utf-8", errors="ignore")
 
 
+def _sanitize(text: str) -> str:
+    """Replace non-ASCII chars that break JSON serialization in llama-server."""
+    import re
+    return re.sub(r'[^\x00-\x7F]', '-', text)
+
+
 def _build_full_context() -> str:
     """
     Build safety-check context via targeted retrieval for medications and allergies.
@@ -105,7 +111,7 @@ def _build_full_context() -> str:
             seen.add(uid)
             ordered.append(c)
 
-    parts = [f"[{c.source}]\n{c.text}" for c in ordered]
+    parts = [f"[{c.source}]\n{_sanitize(c.text)}" for c in ordered]
     return "\n\n---\n\n".join(parts)