fix(mcp): Move all imports to the top of modules

nextcloud_mcp_server/vector/document_chunker.py

@@ -3,6 +3,7 @@
 import logging
 from dataclasses import dataclass
 
+import anyio
 from langchain_text_splitters import RecursiveCharacterTextSplitter
 
 logger = logging.getLogger(__name__)
@@ -68,7 +69,6 @@ class DocumentChunker:
         Returns:
             List of chunks with their character positions in the original content
         """
-        import anyio
 
         # Handle empty content - return single empty chunk for backward compatibility
         if not content:

nextcloud_mcp_server/vector/html_processor.py

@@ -1,6 +1,7 @@
 """HTML to Markdown conversion utilities for vector sync."""
 
 import logging
+import re
 
 from markdownify import markdownify as md
 
@@ -43,7 +44,6 @@ def html_to_markdown(html_content: str | None) -> str:
     except Exception as e:
         logger.warning(f"Failed to convert HTML to Markdown: {e}")
         # Fallback: strip all HTML tags as a last resort
-        import re
 
         text = re.sub(r"<[^>]+>", " ", html_content)
         return " ".join(text.split())  # Normalize whitespace

nextcloud_mcp_server/vector/processor.py

@@ -3,6 +3,7 @@
 Processes documents from stream: fetches content, generates embeddings, stores in Qdrant.
 """
 
+import base64
 import logging
 import time
 import uuid
@@ -585,8 +586,6 @@ async def _index_document(
                 "vector_sync.pdf_size": len(content_bytes),
             },
         ):
-            import base64
-
             from nextcloud_mcp_server.search.pdf_highlighter import PDFHighlighter
 
             # Build chunk data for batch processing

nextcloud_mcp_server/vector/scanner.py

@@ -5,6 +5,7 @@ Periodically scans enabled users' content and queues changed documents for proce
 
 import logging
 import os
+import random
 import time
 from dataclasses import dataclass
 
@@ -167,7 +168,6 @@ async def scan_user_documents(
         nc_client: Authenticated Nextcloud client
         initial_sync: If True, send all documents (first-time sync)
     """
-    import random
 
     scan_id = random.randint(1000, 9999)
     logger.info(