fix: persist translated_filename_stem and pass it to printPdf

- _translate_filename_stem: add success/failure logging, include
  glossary terms in prompt for accurate proper noun translation
- task_state: store translated_filename_stem after translation
- status API: return translated_filename_stem to frontend
- printPdf: accept stem param, set document.title directly instead
  of fragile Content-Disposition header parsing
- Both printPdf call sites now pass task.translatedStem

docutranslate/app.py

@@ -175,6 +175,7 @@ def _create_default_task_state() -> Dict[str, Any]:
         "download_ready": False,
         "workflow_instance": None,  # 仅在处理期间使用
         "original_filename_stem": None,
+        "translated_filename_stem": None,
         "task_start_time": 0,
         "task_end_time": 0,
         "current_task_ref": None,
@@ -631,11 +632,31 @@ async def _translate_filename_stem(
     stem: str, to_lang: str, base_url: str | None, api_key: str, model_id: str | None
 ) -> str:
     """Translate a filename stem to target language for cleaner download filenames."""
+    _logger = logging.getLogger(__name__)
     try:
         clean_base = (base_url or "").strip().rstrip("/")
         clean_model = (model_id or "").strip()
         if not clean_base or not clean_model:
+            _logger.warning(f"Filename translation skipped: LLM not configured (stem='{stem}')")
             return stem
+        # Include glossary terms so proper nouns translate correctly
+        try:
+            from docutranslate.glossary.glossary_store import get_glossary_store
+            rows = get_glossary_store().get_rows()
+            glossary_hint = ", ".join(
+                f"{r.get('zh', '')}={r.get('en', '')}"
+                for r in rows[:20]
+                if r.get('zh') and r.get('en')
+            )
+        except Exception:
+            glossary_hint = ""
+        prompt = (
+            f"Translate the document filename below into {to_lang}. "
+            "Return ONLY the translated name, no file extension, no explanation, no quotes.\n"
+        )
+        if glossary_hint:
+            prompt += f"Reference glossary if relevant: {glossary_hint}\n"
+        prompt += f"Filename: {stem}"
         resp = await httpx_client.post(
             f"{clean_base}/chat/completions",
             headers={
@@ -644,16 +665,7 @@ async def _translate_filename_stem(
             },
             json={
                 "model": clean_model,
-                "messages": [
+                "messages": [{"role": "user", "content": prompt}],
-                    {
-                        "role": "user",
-                        "content": (
-                            f"Translate the document filename below into {to_lang}. "
-                            "Return ONLY the translated name, no file extension, no explanation, no quotes.\n"
-                            f"Filename: {stem}"
-                        ),
-                    }
-                ],
                 "max_tokens": 60,
                 "temperature": 0,
             },
@@ -663,8 +675,11 @@ async def _translate_filename_stem(
         translated = resp.json()["choices"][0]["message"]["content"].strip().strip("\"'")
         sanitized = re.sub(r"[^\w\s\-]", "", translated).strip()
         sanitized = re.sub(r"\s+", "_", sanitized)[:50]
-        return sanitized if sanitized else stem
+        result = sanitized if sanitized else stem
-    except Exception:
+        _logger.info(f"Filename translation: '{stem}' -> '{result}' (lang={to_lang})")
+        return result
+    except Exception as e:
+        _logger.warning(f"Filename translation failed for '{stem}': {e}")
         return stem
 
 
@@ -1178,6 +1193,7 @@ async def _perform_translation(
             getattr(payload, "base_url", None), getattr(payload, "api_key", ""),
             getattr(payload, "model_id", None),
         )
+        task_state["translated_filename_stem"] = translated_stem
 
         # 检查CDN可用性
         is_cdn_available = True
@@ -1972,6 +1988,7 @@ async def service_get_status(
             "error_flag": task_state["error_flag"],
             "download_ready": task_state["download_ready"],
             "original_filename_stem": task_state["original_filename_stem"],
+            "translated_filename_stem": task_state.get("translated_filename_stem") or task_state["original_filename_stem"],
             "original_filename": task_state.get("original_filename"),
             "task_start_time": task_state["task_start_time"],
             "task_end_time": task_state["task_end_time"],

docutranslate/static/index.html

@@ -807,7 +807,7 @@
                                             </li>
                                             <li v-if="task.downloads.html && !task.downloads.pptx">
                                                 <a class="dropdown-item" href="#"
-                                                   @click.prevent="printPdf(task.downloads.html)"><i
+                                                   @click.prevent="printPdf(task.downloads.html, task.translatedStem)"><i
                                                         class="bi bi-file-earmark-pdf me-2"></i>PDF</a>
                                             </li>
                                         </ul>
@@ -933,7 +933,7 @@
                         </a>
                     </li>
                     <li v-if="previewTask.downloads.html && !previewTask.downloads.pptx">
-                        <a class="dropdown-item" href="#" @click.prevent="printPdf(previewTask.downloads.html)">
+                        <a class="dropdown-item" href="#" @click.prevent="printPdf(previewTask.downloads.html, previewTask.translatedStem)">
                             <i class="bi bi-file-earmark-pdf me-2"></i>PDF
                         </a>
                     </li>
@@ -1872,6 +1872,7 @@
                             if (statData.download_ready && !statData.error_flag) {
                                 task.downloads = statData.downloads;
                                 task.attachment = statData.attachment;
+                                task.translatedStem = statData.translated_filename_stem || statData.original_filename_stem;
                                 task.statusClass = 'text-success';
                             } else {
                                 task.statusClass = 'text-danger';
@@ -1978,7 +1979,7 @@
                 localStorage.setItem('ui_sync_scroll_enabled', syncScrollEnabled.value);
             };
 
-            const printPdf = (url) => {
+            const printPdf = (url, stem) => {
                 const msg = t('pdf_preparing') || "正在准备打印，请稍候...";
                 const toastContainer = document.createElement('div');
                 toastContainer.className = 'toast-container position-fixed top-0 start-50 translate-middle-x p-3';
@@ -2005,25 +2006,13 @@
                 }, 3000);
 
                 const ifr = document.getElementById('printFrame');
-                fetch(url).then(r => {
+                fetch(url).then(r => r.text()).then(h => {
-                    const cd = r.headers.get('content-disposition') || '';
-                    // RFC 5987: filename*=UTF-8''<percent-encoded>
-                    const extMatch = cd.match(/filename\*\s*=\s*UTF-8''([^;\s]+)/i);
-                    let printTitle = '';
-                    if (extMatch) {
-                        try { printTitle = decodeURIComponent(extMatch[1]).replace(/\.[^.]+$/, ''); } catch(e) {}
-                    } else {
-                        const plainMatch = cd.match(/filename\s*=\s*["']?([^"'\n;]+)["']?/i);
-                        if (plainMatch) printTitle = plainMatch[1].trim().replace(/\.[^.]+$/, '');
-                    }
-                    return r.text().then(h => ({ h, printTitle }));
-                }).then(({ h, printTitle }) => {
                     ifr.srcdoc = h;
                     ifr.onload = () => {
                         setTimeout(() => {
                             ifr.contentWindow.focus();
                             const originalTitle = document.title;
-                            if (printTitle) document.title = printTitle;
+                            if (stem) document.title = stem;
                             ifr.contentWindow.print();
                             setTimeout(() => { document.title = originalTitle; }, 1000);
                         }, 500);