Update app.py

app.py

@@ -23,7 +23,6 @@ try:
 except Exception:
     requests = None
 
-
 # =====================================================
 # CORE CONFIG
 # =====================================================
@@ -39,7 +38,6 @@ LOG_DIR = "logs"
 os.makedirs(LOG_DIR, exist_ok=True)
 LOG_PATH = os.path.join(LOG_DIR, "conversations.jsonl")
 
-
 # =====================================================
 # KNOWLEDGE BASE (CourseContent / CaseStudyContent)
 # =====================================================
@@ -56,7 +54,6 @@ CASE_PREFIX = "CaseStudyContent__"
 def _is_placeholder_name(name: str) -> bool:
     return "placeholder" in (name or "").lower()
 
-
 # =====================================================
 # MODES (single customization surface) ****** CUSTOMIZE ******
 # =====================================================
@@ -185,7 +182,6 @@ Matching how the persona described in the source would be in a realistic busines
 STUDENT_MODES = list(MODE_REGISTRY.keys())
 DEFAULT_MODE = STUDENT_MODES[0] if STUDENT_MODES else "Course Detailer"
 
-
 # =====================================================
 # OPTIONAL WEB SEARCH (OFF by default) ****** CUSTOMIZE ******
 # =====================================================
@@ -199,7 +195,6 @@ def web_search_snippets(query: str, max_chars: int = 1500) -> str:
         return ""
     return ""
 
-
 # =====================================================
 # MEMORY + LOGGING
 # =====================================================
@@ -222,7 +217,6 @@ def log_turn(mode: str, user_msg: str, assistant_msg: str, upload_meta=None) ->
     with open(LOG_PATH, "a", encoding="utf-8") as f:
         f.write(json.dumps(rec, ensure_ascii=False) + "\n")
 
-
 # =====================================================
 # OUTPUT CLEANING
 # =====================================================
@@ -235,7 +229,6 @@ def strip_think(text: str) -> str:
     cleaned = _THINK_RE.sub("", text).strip()
     return cleaned if cleaned else "(No visible answer returned. Please re-try.)"
 
-
 # =====================================================
 # FILE EXTRACTION
 # =====================================================
@@ -412,7 +405,6 @@ def files_to_text(upload_paths) -> tuple[str, list[dict], str]:
     badge = f"Attached: {', '.join(names[:MAX_FILES])}" if names else ""
     return combined, meta_list, badge
 
-
 # =====================================================
 # STATIC KB INGESTION
 # =====================================================
@@ -470,7 +462,6 @@ COURSE_PATHS, CASE_PATHS = _list_kb_files()
 COURSE_KB_TEXT, COURSE_PLACEHOLDER_ONLY = _kb_extract(COURSE_PATHS, "CourseContent")
 CASE_KB_TEXT, CASE_PLACEHOLDER_ONLY = _kb_extract(CASE_PATHS, "CaseStudyContent")
 
-
 # =====================================================
 # DEMO ASSUMPTIONS
 # =====================================================
@@ -541,7 +532,6 @@ def kb_block_for_mode(mode: str) -> str:
     # fallback
     return "[Knowledge Base]\n(none)"
 
-
 # =====================================================
 # LLM COMPLETION
 # =====================================================
@@ -562,7 +552,6 @@ def complete_llm(messages, mode: str) -> str:
         return r["choices"][0]["message"]["content"]
     return r.choices[0].message.content
 
-
 # =====================================================
 # PER-MODE CHAT HISTORY SUPPORT
 # =====================================================
@@ -570,7 +559,6 @@ def complete_llm(messages, mode: str) -> str:
 def load_history_for_mode(selected_mode, histories):
     return histories.get(selected_mode, [])
 
-
 # =====================================================
 # MAIN CHAT HANDLER
 # =====================================================
@@ -645,7 +633,6 @@ def chat_user(message, visible_history, mode, upload_paths, histories, memory_st
     # Clear textbox AND upload after sending
     return new_history, "", None, histories, memory_state, flags_state
 
-
 # =====================================================
 # EXPORT & RESET
 # =====================================================
@@ -665,7 +652,6 @@ def reset_chat(histories, memory_state, flags_state):
         histories[k] = []
     return [], None, "", histories, memory_state, flags_state
 
-
 # =====================================================
 # UI
 # =====================================================