Fix: auto-load sample docs at startup so state survives restarts

app.py

@@ -45,6 +45,24 @@ _graph       = build_graph(_retriever)
 _raw_docs: List[Tuple[str, str]] = []   # (original_text, filename) for safety checker
 
 
+def _auto_load_samples() -> None:
+    """Pre-load sample docs at startup so the app is ready immediately after any restart."""
+    if not SAMPLE_DIR.exists():
+        return
+    docs = [
+        (p.read_text(encoding="utf-8", errors="ignore"), p.name)
+        for p in sorted(SAMPLE_DIR.glob("*.txt"))
+    ]
+    if not docs:
+        return
+    _retriever.add_documents(docs)
+    _raw_docs.clear()
+    _raw_docs.extend(docs)
+    print(f"[startup] Auto-loaded {len(docs)} sample docs → {len(_retriever.chunks)} chunks ready")
+
+_auto_load_samples()
+
+
 # ── Model call helper (shared by agent + safety checker) ──────────────────────
 
 def _call_model(prompt: str, max_tokens: int = 600, json_mode: bool = False) -> str: