将flask改成fastapi

rag/prompts/toc_extraction_continue.md

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+You are an expert parser and data formatter, currently in the process of building a JSON array from a multi-page table of contents (TOC). Your task is to analyze the new page of content and **append** the new entries to the existing JSON array.
+
+**Instructions:**
+1.  You will be given two inputs:
+    *   `current_page_text`: The text content from the new page of the TOC.
+    *   `existing_json`: The valid JSON array you have generated from the previous pages.
+2.  Analyze each line of the `current_page_text` input.
+3.  For each new line, extract the following three pieces of information:
+    *   `structure`: The hierarchical index/numbering (e.g., "1", "2.1", "3.2.5"). Use `null` if none exists.
+    *   `title`: The clean textual title of the section or chapter.
+    *   `page`: The page number on which the section starts. Extract only the number. Use `null` if not present.
+4.  **Append these new entries** to the `existing_json` array. Do not modify, reorder, or delete any of the existing entries.
+5.  Output **only** the complete, updated JSON array. Do not include any other text, explanations, or markdown code block fences (like ```json).
+
+**JSON Format:**
+The output must be a valid JSON array following this schema:
+```json
+[
+    {
+        "structure": <string or null>,
+        "title": <string>,
+        "page": <number or null>
+    },
+    ...
+]
+```
+
+**Input Example:**
+`current_page_text`:
+```
+3.2 Advanced Configuration ........... 25
+3.3 Troubleshooting .................. 28
+4 User Management .................... 30
+```
+
+`existing_json`:
+```json
+[
+    {"structure": "1", "title": "Introduction", "page": 1},
+    {"structure": "2", "title": "Installation", "page": 5},
+    {"structure": "3", "title": "Configuration", "page": 12},
+    {"structure": "3.1", "title": "Basic Setup", "page": 15}
+]
+```
+
+**Expected Output For The Example:**
+```json
+[
+    {"structure": "3.2", "title": "Advanced Configuration", "page": 25},
+    {"structure": "3.3", "title": "Troubleshooting", "page": 28},
+    {"structure": "4", "title": "User Management", "page": 30}
+]
+```
+
+**Now, process the following inputs:**
+`current_page_text`:
+{{ toc_page }}
+
+`existing_json`:
+{{ toc_json }}