refactor: 清理冗余代码和过时配置

app/config.py

@@ -22,7 +22,6 @@ class Settings(BaseSettings):
 
     # HuggingFace / arXiv
     HF_API_BASE: str = "https://huggingface.co/api"
-    HF_PROXY: str = ""
     TOP_N: int = 20
     HTTP_TIMEOUT_SECONDS: int = 30
     HTTP_MAX_RETRIES: int = 3

app/services/pdf_image_extractor.py

@@ -501,10 +501,6 @@ def _image_sort_key(name: str) -> tuple[int, int]:
     m = re.search(r"(?:figure|table)_(\d+)", name)
     if m:
         return (0, int(m.group(1)))
-    # 旧格式：page2_img1.png, page5_table1.png, figure_1.png
-    m2 = re.search(r"page(\d+)_(?:img|table)(\d+)", name)
-    if m2:
-        return (int(m2.group(1)), int(m2.group(2)))
     return (0, 0)
 
 

app/services/pi_client.py

@@ -13,11 +13,8 @@ from pathlib import Path
 from app.config import settings
 from app.utils import truncate_error
 from app.services.summary_utils import (
-    JsonNotFoundError,
     build_prompt,
-    extract_json,
     extract_pdf_text,
-    write_meta_json,
 )
 
 logger = logging.getLogger(__name__)
@@ -25,18 +22,6 @@ logger = logging.getLogger(__name__)
 # PDF 全文注入模式的字符上限 — 超过此阈值自动切换到 search 模式
 _PDF_MAX_CHARS = 80_000
 
-# 重新导出，保持向后兼容
-__all__ = [
-    "PiTimeoutError",
-    "PiProcessError",
-    "JsonNotFoundError",
-    "call_pi",
-    "write_meta_json",
-    "extract_pdf_text",
-    "build_prompt",
-    "extract_json",
-]
-
 
 # ── 自定义异常 ──────────────────────────────────────────────────────────
 

app/services/summary_persister.py

@@ -24,22 +24,6 @@ from app.utils import TMP_DIR, truncate_error, utc_now
 logger = logging.getLogger(__name__)
 
 
-# ── FTS5 文本构建 ───────────────────────────────────────────────────────
-
-
-def _build_fts_summary_text(schema: SummarySchema) -> str:
-    """拼接用于 FTS5 索引的总结文本。"""
-    parts = [
-        schema.one_line or "",
-        schema.motivation.problem or "",
-        schema.motivation.goal or "",
-        schema.method.overview or "",
-        schema.method.key_idea or "",
-        schema.results.main_findings or "",
-    ]
-    return " ".join(p for p in parts if p)
-
-
 # ── DB 更新 ─────────────────────────────────────────────────────────────