feat(ui,markdown): add collapsible 'Thoughts' for <think>, sanitize titles, improve focus UX; refactor table/blockquote render & styles

Backend: HTML-unescape and strip <think>/<thinking> from generated titles; trim and return cleaned value; add debug logs.

Electron: send 'window-focused' from main; expose onWindowFocus in preload.

Frontend: stream-safe AssistantMessageContent with collapsible Thoughts; switch streaming render to React state updates; autofocus textarea on window focus/new chat and when clicking empty chat area; sanitize session title client-side.

Markdown: support blockquotes; allow '-' or '*' bullets; simplify <think> removal to handle streaming; drop table wrapper div (emit <table class='nice'>); theme-aware code block headers/borders.

CSS: rounded 'nice' tables with light inner grid; blockquote styling; Thoughts toggle/panel styles.

Color: brighten Grayscale --accent.

Follow-ups: add IPC listener cleanup; ensure single source of truth for colorSchemes.

backend/main.py

@@ -3,6 +3,8 @@ from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import StreamingResponse
 from sqlalchemy.orm import Session
 from typing import List
+import re # Import the regex module
+import html # Import the html module for unescaping
 from . import models, schemas
 from .database import Base, engine, SessionLocal
 from .ollama_client import list_models as ollama_list, chat as ollama_chat, chat_stream as ollama_chat_stream
@@ -125,10 +127,22 @@ async def generate_title(req: schemas.GenerateTitleRequest, db: Session = Depend
     except Exception as e:
         raise HTTPException(status_code=502, detail=f"Ollama error: {e}")
 
-    session.name = title
+    print(f"Original title from LLM: {title}") # Debugging line to see the raw title
+
+    # HTML unescape the title first to handle encoded tags
+    unescaped_title = html.unescape(title)
+    print(f"Unescaped title: {unescaped_title}") # Debugging line to see the unescaped title
+
+    # Remove <think> blocks from the unescaped title
+    # Use re.IGNORECASE to handle potential variations in casing (e.g., <Think>)
+    cleaned_title = re.sub(r'<think>.*?</think>', '', unescaped_title, flags=re.DOTALL | re.IGNORECASE)
+    
+    print(f"Cleaned title before saving: {cleaned_title.strip()}") # Debugging line to see the cleaned title
+
+    session.name = cleaned_title.strip() # Use .strip() to remove any leading/trailing whitespace after removal
     db.commit()
 
-    return {"title": title}
+    return {"title": cleaned_title.strip()}
 
 @app.delete("/sessions/{session_id}")
 def delete_session(session_id: str, db: Session = Depends(get_db)):