feat(rag): wire RAG settings to Hook API and add simulation tests

tests/test_rag_visual_sim.py

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+import pytest
+import time
+import sys
+import os
+import shutil
+import tempfile
+from pathlib import Path
+
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "src")))
+
+from src import api_hook_client
+
+@pytest.mark.integration
+def test_rag_full_lifecycle_sim(live_gui):
+ client = api_hook_client.ApiHookClient()
+ assert client.wait_for_server(timeout=15), "Hook server did not start"
+ 
+ # 1. Setup mock project data
+ test_dir = tempfile.mkdtemp()
+ try:
+  (Path(test_dir) / "test_file.txt").write_text("This is a test file about RAG integration. It should be indexed.")
+  (Path(test_dir) / "other_file.py").write_text("# This is another file\ndef hello():\n print('world')")
+  
+  # 2. Configure project through Hook API
+  client.set_value('files_base_dir', test_dir)
+  client.set_value('rag_enabled', True)
+  client.set_value('rag_source', 'mock') # Use mock to avoid sentence-transformers dependency in CI
+  
+  # 3. Verify initial status
+  status = client.get_value('rag_status')
+  assert status in ['idle', 'ready'], f"Unexpected initial status: {status}"
+  
+  # 4. Trigger Rebuild Index
+  print("[SIM] Triggering index rebuild...")
+  client.click('btn_rebuild_rag_index')
+  
+  # 5. Wait for status transition
+  # Wait for 'indexing...'
+  found_indexing = False
+  for _ in range(20):
+   status = client.get_value('rag_status')
+   if status == 'indexing...':
+    found_indexing = True
+    break
+   time.sleep(0.1)
+  
+  print(f"[SIM] Found indexing: {found_indexing}")
+  
+  # Wait for 'ready'
+  success = False
+  for _ in range(50):
+   status = client.get_value('rag_status')
+   if status == 'ready':
+    success = True
+    break
+   if "error" in status.lower():
+    pytest.fail(f"RAG indexing failed: {status}")
+   time.sleep(0.2)
+  
+  assert success, f"RAG indexing timed out. Final status: {status}"
+  print("[SIM] RAG indexing SUCCESS.")
+  
+  # 6. Verify retrieval visualization
+  # We simulate a response that has RAG context prepended
+  # Since we are testing GUI visualization, we'll manually inject a message into the discussion
+  # that contains the RAG marker, then verify the GUI state if possible.
+  # However, verifying ImGui internal render state via Hook API is limited to exposed fields.
+  # We've already verified the wiring of settings and status.
+  
+  # One final check: toggle RAG off and verify
+  client.set_value('rag_enabled', False)
+  assert client.get_value('rag_enabled') is False
+  
+ finally:
+  shutil.rmtree(test_dir)
+
+@pytest.mark.integration
+def test_rag_settings_persistence_sim(live_gui):
+ client = api_hook_client.ApiHookClient()
+ assert client.wait_for_server(timeout=15)
+ 
+ # Change settings
+ client.set_value('rag_chunk_size', 1234)
+ client.set_value('rag_chunk_overlap', 56)
+ 
+ # Verify they were set in the controller
+ assert client.get_value('rag_chunk_size') == 1234
+ assert client.get_value('rag_chunk_overlap') == 56
+ 
+ print("[SIM] RAG settings persistence simulation PASSED.")