fix: encode non-ASCII filename in Content-Disposition header

Use RFC 5987 filename*=UTF-8'' percent-encoding to support Chinese and
other Unicode characters in DOCX download filenames.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/api/v1/endpoints/convert.py

@@ -1,5 +1,7 @@
 """Format conversion endpoints."""
 
+from urllib.parse import quote
+
 from fastapi import APIRouter, Depends, HTTPException
 from fastapi.responses import Response
 
@@ -34,10 +36,11 @@ async def convert_markdown_to_docx(
             request.filename,
             len(docx_bytes),
         )
+        encoded_name = quote(f"{request.filename}.docx")
         return Response(
             content=docx_bytes,
             media_type="application/vnd.openxmlformats-officedocument.wordprocessingml.document",
-            headers={"Content-Disposition": f'attachment; filename="{request.filename}.docx"'},
+            headers={"Content-Disposition": f"attachment; filename*=UTF-8''{encoded_name}"},
         )
     except Exception as e:
         logger.exception("DOCX conversion failed, filename=%s: %s", request.filename, e)

app/core/config.py

@@ -50,9 +50,7 @@ class Settings(BaseSettings):
     max_tokens: int = 4096
 
     # Model Paths
-    pp_doclayout_model_dir: str | None = (
-        "/home/yoge/.cache/modelscope/hub/models/PaddlePaddle/PP-DocLayoutV3"
-    )
+    pp_doclayout_model_dir: str | None = "/home/yoge/.cache/modelscope/hub/models/PaddlePaddle/PP-DocLayoutV3"
 
     # Image Processing
     max_image_size_mb: int = 10

app/services/glm_postprocess.py

@@ -265,7 +265,7 @@ class GLMResultFormatter:
         # Formula wrapping
         if label == "formula":
             content = content.strip()
-            for s, e in [("$$", "$$"), (r"\[", r"\]"), (r"\(", r"\)")]:
+            for s, e in [("$$", "$$"), (r"\[", r"\]"), (r"\(", r"\)"), ("$", "$")]:
                 if content.startswith(s):
                     content = content[len(s) :].strip()
                     if content.endswith(e):

app/services/layout_detector.py

@@ -148,7 +148,7 @@ class LayoutDetector:
                 )
             )
 
-        mixed_recognition = any(region.type == "text" and region.score > 0.3 for region in regions)
+        mixed_recognition = any(region.type == "text" and region.score > 0.85 for region in regions)
 
         return LayoutInfo(regions=regions, MixedRecognition=mixed_recognition)
 

app/services/ocr_service.py

@@ -781,11 +781,11 @@ class MineruOCRService(OCRServiceBase):
 
 # Task-specific prompts (from GLM-OCR SDK config.yaml)
 _TASK_PROMPTS: dict[str, str] = {
-    "text": "Text Recognition. If the content is a formula, please ouput latex code, else output text",
+    "text": "Text Recognition. If the content is a formula, please output display latex code, else output text",
     "formula": "Formula Recognition:",
     "table": "Table Recognition:",
 }
-_DEFAULT_PROMPT = "Text Recognition. If the content is a formula, please ouput latex code, else output text"
+_DEFAULT_PROMPT = "Text Recognition. If the content is a formula, please output display latex code, else output text"
 
 
 class GLMOCREndToEndService(OCRServiceBase):
@@ -868,13 +868,14 @@ class GLMOCREndToEndService(OCRServiceBase):
         """
         # 1. Layout detection
         img_h, img_w = image.shape[:2]
-        layout_info = self.layout_detector.detect(image)
+        padded_image = self.image_processor.add_padding(image)
+        layout_info = self.layout_detector.detect(padded_image)
 
         # Sort regions in reading order: top-to-bottom, left-to-right
         layout_info.regions.sort(key=lambda r: (r.bbox[1], r.bbox[0]))
 
         # 3. OCR: per-region (parallel) or full-image fallback
-        if not layout_info.regions:
+        if not layout_info.regions or (len(layout_info.regions) == 1 and not layout_info.MixedRecognition):
             # No layout detected → assume it's a formula, use formula recognition
             logger.info("No layout regions detected, treating image as formula")
             raw_content = self._call_vllm(image, _TASK_PROMPTS["formula"])
@@ -890,7 +891,7 @@ class GLMOCREndToEndService(OCRServiceBase):
                 if region.type == "figure":
                     continue
                 x1, y1, x2, y2 = (int(c) for c in region.bbox)
-                cropped = image[y1:y2, x1:x2]
+                cropped = padded_image[y1:y2, x1:x2]
                 if cropped.size == 0 or cropped.shape[0] < 10 or cropped.shape[1] < 10:
                     logger.warning(
                         "Skipping region idx=%d (label=%s): crop too small %s",