diff --git a/ReportEngine/nodes/chapter_generation_node.py b/ReportEngine/nodes/chapter_generation_node.py
index 0e12ee7..0e38a12 100644
--- a/ReportEngine/nodes/chapter_generation_node.py
+++ b/ReportEngine/nodes/chapter_generation_node.py
@@ -10,12 +10,12 @@ from __future__ import annotations
 import json
 from pathlib import Path
 import re
-from typing import Any, Dict, List, Tuple
+from typing import Any, Dict, List, Tuple, Callable, Optional
 
 from loguru import logger
 
 from ..core import TemplateSection, ChapterStorage
-from ..ir import ALLOWED_BLOCK_TYPES, IRValidator
+from ..ir import ALLOWED_BLOCK_TYPES, ALLOWED_INLINE_MARKS, IRValidator
 from ..prompts import (
     SYSTEM_PROMPT_CHAPTER_JSON,
     build_chapter_user_prompt,
@@ -28,10 +28,41 @@ except ImportError:  # pragma: no cover - optional dependency
     _json_repair_fn = None
 
 
+class ChapterJsonParseError(ValueError):
+    """Raised when the LLM output for a chapter cannot be parsed as valid JSON."""
+
+    def __init__(self, message: str, raw_text: Optional[str] = None):
+        super().__init__(message)
+        self.raw_text = raw_text
+
+
 class ChapterGenerationNode(BaseNode):
     """负责按章节调用LLM并校验JSON结构"""
 
     _COLON_EQUALS_PATTERN = re.compile(r'(":\s*)=')
+    _LINE_BREAK_SENTINEL = "__LINE_BREAK__"
+    _INLINE_MARK_ALIASES = {
+        "strong": "bold",
+        "b": "bold",
+        "em": "italic",
+        "emphasis": "italic",
+        "i": "italic",
+        "u": "underline",
+        "strike-through": "strike",
+        "strikethrough": "strike",
+        "s": "strike",
+        "codeblock": "code",
+        "monospace": "code",
+        "hyperlink": "link",
+        "url": "link",
+        "colour": "color",
+        "textcolor": "color",
+        "bgcolor": "highlight",
+        "background": "highlight",
+        "highlightcolor": "highlight",
+        "sub": "subscript",
+        "sup": "superscript",
+    }
 
     def __init__(self, llm_client, validator: IRValidator, storage: ChapterStorage):
         """
@@ -51,6 +82,7 @@ class ChapterGenerationNode(BaseNode):
         section: TemplateSection,
         context: Dict[str, Any],
         run_dir: Path,
+        stream_callback: Optional[Callable[[str, Dict[str, Any]], None]] = None,
         **kwargs,
     ) -> Dict[str, Any]:
         """针对单个章节调用LLM，校验/落盘章节JSON并返回结构化结果"""
@@ -64,7 +96,13 @@ class ChapterGenerationNode(BaseNode):
         llm_payload = self._build_payload(section, context)
         user_message = build_chapter_user_prompt(llm_payload)
 
-        raw_text = self._stream_llm(user_message, chapter_dir, **kwargs)
+        raw_text = self._stream_llm(
+            user_message,
+            chapter_dir,
+            stream_callback=stream_callback,
+            section_meta=chapter_meta,
+            **kwargs,
+        )
         chapter_json = self._parse_chapter(raw_text)
 
         # 自动补全关键字段后再校验
@@ -150,8 +188,15 @@ class ChapterGenerationNode(BaseNode):
                 payload["globalContext"]["sectionBudgets"] = chapter_plan["sections"]
         return payload
 
-    def _stream_llm(self, user_message: str, chapter_dir: Path, **kwargs) -> str:
-        """流式调用LLM并实时写入raw文件"""
+    def _stream_llm(
+        self,
+        user_message: str,
+        chapter_dir: Path,
+        stream_callback: Optional[Callable[[str, Dict[str, Any]], None]] = None,
+        section_meta: Optional[Dict[str, Any]] = None,
+        **kwargs,
+    ) -> str:
+        """流式调用LLM并实时写入raw文件，同时通过回调将delta抛出。"""
         chunks: List[str] = []
         with self.storage.capture_stream(chapter_dir) as stream_fp:
             stream = self.llm_client.stream_invoke(
@@ -163,6 +208,12 @@ class ChapterGenerationNode(BaseNode):
             for delta in stream:
                 stream_fp.write(delta)
                 chunks.append(delta)
+                if stream_callback:
+                    meta = section_meta or {}
+                    try:
+                        stream_callback(delta, meta)
+                    except Exception as callback_error:  # pragma: no cover - 仅记录，不阻断主流程
+                        logger.warning(f"章节流式回调失败: {callback_error}")
         return "".join(chunks)
 
     def _parse_chapter(self, raw_text: str) -> Dict[str, Any]:
@@ -192,9 +243,13 @@ class ChapterGenerationNode(BaseNode):
                 try:
                     data = self._parse_with_candidates(candidate_payloads[-1:])
                 except json.JSONDecodeError as inner_exc:
-                    raise ValueError(f"章节JSON解析失败: {inner_exc}") from inner_exc
+                    raise ChapterJsonParseError(
+                        f"章节JSON解析失败: {inner_exc}", raw_text=cleaned
+                    ) from inner_exc
             else:
-                raise ValueError(f"章节JSON解析失败: {exc}") from exc
+                raise ChapterJsonParseError(
+                    f"章节JSON解析失败: {exc}", raw_text=cleaned
+                ) from exc
 
         if "chapter" in data and isinstance(data["chapter"], dict):
             return data["chapter"]
@@ -400,6 +455,7 @@ class ChapterGenerationNode(BaseNode):
                 if not isinstance(block, dict):
                     continue
                 self._ensure_block_type(block)
+                self._sanitize_block_content(block)
                 block_type = block.get("type")
                 if block_type == "list":
                     items = block.get("items")
@@ -424,6 +480,98 @@ class ChapterGenerationNode(BaseNode):
 
         walk(chapter.get("blocks"))
 
+    def _sanitize_block_content(self, block: Dict[str, Any]):
+        """根据类型做精细化修复，例如清理paragraph内的非法inline mark"""
+        block_type = block.get("type")
+        if block_type == "paragraph":
+            self._normalize_paragraph_block(block)
+
+    def _normalize_paragraph_block(self, block: Dict[str, Any]):
+        """将paragraph的inlines统一规整，剔除非法marks"""
+        inlines = block.get("inlines")
+        normalized_runs: List[Dict[str, Any]] = []
+        if isinstance(inlines, list) and inlines:
+            for run in inlines:
+                normalized_runs.extend(self._coerce_inline_run(run))
+        else:
+            normalized_runs = [self._as_inline_run(self._extract_block_text(block))]
+        if not normalized_runs:
+            normalized_runs = [self._as_inline_run("")]
+        block["inlines"] = normalized_runs
+
+    def _coerce_inline_run(self, run: Any) -> List[Dict[str, Any]]:
+        """将任意inline写法规整为合法run"""
+        if isinstance(run, dict):
+            normalized_run = dict(run)
+            text = normalized_run.get("text")
+            if not isinstance(text, str):
+                text = "" if text is None else str(text)
+            marks = normalized_run.get("marks")
+            sanitized_marks, extra_text = self._sanitize_inline_marks(marks)
+            normalized_run["marks"] = sanitized_marks
+            normalized_run["text"] = (text or "") + extra_text
+            return [normalized_run]
+        if isinstance(run, str):
+            return [self._as_inline_run(run)]
+        if isinstance(run, (int, float)):
+            return [self._as_inline_run(str(run))]
+        if isinstance(run, list):
+            normalized: List[Dict[str, Any]] = []
+            for item in run:
+                normalized.extend(self._coerce_inline_run(item))
+            return normalized
+        return [self._as_inline_run("" if run is None else str(run))]
+
+    def _sanitize_inline_marks(self, marks: Any) -> Tuple[List[Dict[str, Any]], str]:
+        """过滤非法marks并将break类控制符转成文本"""
+        text_suffix = ""
+        if marks is None:
+            return [], text_suffix
+        mark_list = marks if isinstance(marks, list) else [marks]
+        sanitized: List[Dict[str, Any]] = []
+        for mark in mark_list:
+            normalized_mark, extra_text = self._normalize_inline_mark(mark)
+            if normalized_mark:
+                sanitized.append(normalized_mark)
+            if extra_text:
+                text_suffix += extra_text
+        return sanitized, text_suffix
+
+    def _normalize_inline_mark(self, mark: Any) -> Tuple[Dict[str, Any] | None, str]:
+        """对单个mark做兼容映射，或者在必要时转换为文本"""
+        if not isinstance(mark, dict):
+            return None, ""
+        canonical_type = self._canonical_inline_mark_type(mark.get("type"))
+        if canonical_type == self._LINE_BREAK_SENTINEL:
+            return None, "\n"
+        if canonical_type in ALLOWED_INLINE_MARKS:
+            normalized = dict(mark)
+            normalized["type"] = canonical_type
+            return normalized, ""
+        return None, ""
+
+    def _canonical_inline_mark_type(self, mark_type: Any) -> str | None:
+        """将mark type映射为Schema所支持的取值"""
+        if not isinstance(mark_type, str):
+            return None
+        normalized = mark_type.strip()
+        if not normalized:
+            return None
+        lowered = normalized.lower()
+        if lowered in {"break", "linebreak", "br"}:
+            return self._LINE_BREAK_SENTINEL
+        return self._INLINE_MARK_ALIASES.get(lowered, lowered)
+
+    def _extract_block_text(self, block: Dict[str, Any]) -> str:
+        """优先从text/content等字段提取fallback文本"""
+        for key in ("text", "content", "value", "title"):
+            value = block.get(key)
+            if isinstance(value, str):
+                return value
+            if value is not None:
+                return str(value)
+        return ""
+
     def _normalize_list_items(self, items: Any) -> List[List[Dict[str, Any]]]:
         """确保list block的items为[[block, block], ...]结构"""
         if not isinstance(items, list):
@@ -490,16 +638,21 @@ class ChapterGenerationNode(BaseNode):
                 text = str(block)
         block.clear()
         block["type"] = "paragraph"
-        block["inlines"] = [{"text": text}]
+        block["inlines"] = [self._as_inline_run(text)]
 
     @staticmethod
     def _as_paragraph_block(text: str) -> Dict[str, Any]:
         """将字符串快速包装成paragraph block，方便统一处理"""
         return {
             "type": "paragraph",
-            "inlines": [{"text": text or ""}],
+            "inlines": [ChapterGenerationNode._as_inline_run(text)],
         }
 
+    @staticmethod
+    def _as_inline_run(text: str) -> Dict[str, Any]:
+        """构造基础inline run，保证marks字段存在"""
+        return {"text": text or "", "marks": []}
+
     @staticmethod
     def _parse_with_candidates(payloads: List[str]) -> Dict[str, Any]:
         """按顺序尝试多个payload，直到解析成功"""
@@ -513,4 +666,4 @@ class ChapterGenerationNode(BaseNode):
         raise last_exc
 
 
-__all__ = ["ChapterGenerationNode"]
+__all__ = ["ChapterGenerationNode", "ChapterJsonParseError"]
diff --git a/ReportEngine/renderers/html_renderer.py b/ReportEngine/renderers/html_renderer.py
index b7a73ae..0a9f199 100644
--- a/ReportEngine/renderers/html_renderer.py
+++ b/ReportEngine/renderers/html_renderer.py
@@ -4,6 +4,7 @@
 
 from __future__ import annotations
 
+import ast
 import html
 import json
 from typing import Any, Dict, List
@@ -51,7 +52,7 @@ class HTMLRenderer:
 
         head = self._render_head(title, theme_tokens)
         body = self._render_body()
-        return f"<!DOCTYPE html>\n<html lang=\"zh-CN\">\n{head}\n{body}\n</html>"
+        return f"<!DOCTYPE html>\n<html lang=\"zh-CN\" class=\"no-js\">\n{head}\n{body}\n</html>"
 
     # ====== Head / Body ======
 
@@ -83,6 +84,10 @@ class HTMLRenderer:
   <style>
 {css}
   </style>
+  <script>
+    document.documentElement.classList.remove('no-js');
+    document.documentElement.classList.add('js-ready');
+  </script>
 </head>""".strip()
 
     def _render_body(self) -> str:
@@ -423,6 +428,8 @@ class HTMLRenderer:
         items_html = ""
         for item in block.get("items", []):
             content = self._render_blocks(item)
+            if not content.strip():
+                continue
             items_html += f"<li>{content}</li>"
         class_attr = f' class="{extra_class}"' if extra_class else ""
         return f'<{tag}{class_attr}>{items_html}</{tag}>'
@@ -545,7 +552,7 @@ class HTMLRenderer:
                 row_cells.append(f"<td>{self._escape_html(value)}</td>")
             body_rows += f"<tr>{''.join(row_cells)}</tr>"
         table_html = f"""
-        <div class="chart-fallback">
+        <div class="chart-fallback" data-prebuilt="true">
           <table>
             <thead>
               <tr><th>类别</th>{header_cells}</tr>
@@ -556,20 +563,93 @@ class HTMLRenderer:
           </table>
         </div>
         """
-        return f"<noscript>{table_html}</noscript>"
+        return table_html
 
     # ====== Inline 渲染 ======
 
+    def _normalize_inline_payload(self, run: Dict[str, Any]) -> tuple[str, List[Dict[str, Any]]]:
+        """将嵌套inline node展平成基础文本与marks"""
+        if not isinstance(run, dict):
+            return ("" if run is None else str(run)), []
+
+        marks = list(run.get("marks") or [])
+        text_value: Any = run.get("text", "")
+        seen: set[int] = set()
+
+        while isinstance(text_value, dict):
+            obj_id = id(text_value)
+            if obj_id in seen:
+                text_value = ""
+                break
+            seen.add(obj_id)
+            nested_marks = text_value.get("marks")
+            if nested_marks:
+                marks.extend(nested_marks)
+            if "text" in text_value:
+                text_value = text_value.get("text")
+            else:
+                text_value = json.dumps(text_value, ensure_ascii=False)
+                break
+
+        if text_value is None:
+            text_value = ""
+        elif isinstance(text_value, (int, float)):
+            text_value = str(text_value)
+        elif not isinstance(text_value, str):
+            try:
+                text_value = json.dumps(text_value, ensure_ascii=False)
+            except TypeError:
+                text_value = str(text_value)
+
+        if isinstance(text_value, str):
+            stripped = text_value.strip()
+            if stripped.startswith("{") and stripped.endswith("}"):
+                payload = None
+                try:
+                    payload = json.loads(stripped)
+                except json.JSONDecodeError:
+                    try:
+                        payload = ast.literal_eval(stripped)
+                    except (ValueError, SyntaxError):
+                        payload = None
+                if isinstance(payload, dict):
+                    sentinel_keys = {"xrefs", "widgets", "footnotes", "errors", "metadata"}
+                    if set(payload.keys()).issubset(sentinel_keys):
+                        text_value = ""
+                    else:
+                        inline_payload = self._coerce_inline_payload(payload)
+                        if inline_payload:
+                            nested_text = inline_payload.get("text")
+                            if nested_text is not None:
+                                text_value = nested_text
+                            nested_marks = inline_payload.get("marks")
+                            if isinstance(nested_marks, list):
+                                marks.extend(nested_marks)
+
+        return text_value, marks
+
+    @staticmethod
+    def _coerce_inline_payload(payload: Dict[str, Any]) -> Dict[str, Any] | None:
+        """尽力将字符串里的内联节点恢复为dict，修复渲染遗漏"""
+        if not isinstance(payload, dict):
+            return None
+        inline_type = payload.get("type")
+        if inline_type and inline_type not in {"inline", "text"}:
+            return None
+        if "text" not in payload and "marks" not in payload:
+            return None
+        return payload
+
     def _render_inline(self, run: Dict[str, Any]) -> str:
         """渲染单个inline run，支持多种marks叠加"""
-        marks = run.get("marks") or []
+        text_value, marks = self._normalize_inline_payload(run)
         math_mark = next((mark for mark in marks if mark.get("type") == "math"), None)
         if math_mark:
             latex = math_mark.get("value")
             if not isinstance(latex, str) or not latex.strip():
-                latex = run.get("text", "")
+                latex = text_value
             return f'<span class="math-inline">\\( {self._escape_html(latex)} \\)</span>'
-        text = self._escape_html(run.get("text", ""))
+        text = self._escape_html(text_value)
         styles: List[str] = []
         prefix: List[str] = []
         suffix: List[str] = []
@@ -653,6 +733,30 @@ class HTMLRenderer:
             cursor = end + 2
         return "".join(result)
 
+    # ====== 文本 / 安全工具 ======
+
+    def _safe_text(self, value: Any) -> str:
+        """将任意值安全转换为字符串，None与复杂对象容错"""
+        if value is None:
+            return ""
+        if isinstance(value, str):
+            return value
+        if isinstance(value, (int, float, bool)):
+            return str(value)
+        try:
+            return json.dumps(value, ensure_ascii=False)
+        except (TypeError, ValueError):
+            return str(value)
+
+    def _escape_html(self, value: Any) -> str:
+        """HTML文本上下文的转义"""
+        return html.escape(self._safe_text(value), quote=False)
+
+    def _escape_attr(self, value: Any) -> str:
+        """HTML属性上下文转义并去掉危险换行"""
+        escaped = html.escape(self._safe_text(value), quote=True)
+        return escaped.replace("\n", " ").replace("\r", " ")
+
     # ====== CSS / JS ======
 
     def _build_css(self, tokens: Dict[str, Any]) -> str:
@@ -1013,10 +1117,17 @@ table th {{
   min-height: 320px;
 }}
 .chart-fallback {{
+  display: none;
   margin-top: 12px;
   font-size: 0.85rem;
   overflow-x: auto;
 }}
+.no-js .chart-fallback {{
+  display: block;
+}}
+.no-js .chart-container {{
+  display: none;
+}}
 .chart-fallback table {{
   width: 100%;
   border-collapse: collapse;
@@ -1030,6 +1141,11 @@ table th {{
 .chart-fallback th {{
   background: rgba(0,0,0,0.04);
 }}
+.chart-note {{
+  margin-top: 8px;
+  font-size: 0.85rem;
+  color: var(--secondary-color);
+}}
 figure {{
   margin: 20px 0;
   text-align: center;
@@ -1091,7 +1207,19 @@ pre.code-block {{
         """返回页面底部的JS，负责Chart.js注水与导出逻辑"""
         return """
 <script>
+document.documentElement.classList.remove('no-js');
+document.documentElement.classList.add('js-ready');
+
 const chartRegistry = [];
+const STABLE_CHART_TYPES = ['line', 'bar'];
+const CHART_TYPE_LABELS = {
+  line: '折线图',
+  bar: '柱状图',
+  doughnut: '圆环图',
+  pie: '饼图',
+  radar: '雷达图',
+  polarArea: '极地区域图'
+};
 
 function getThemePalette() {
   const styles = getComputedStyle(document.body);
@@ -1103,38 +1231,235 @@ function getThemePalette() {
 
 function applyChartTheme(chart) {
   if (!chart) return;
-  const palette = getThemePalette();
-  const options = chart.options || {};
-  options.plugins = options.plugins || {};
-  options.plugins.legend = options.plugins.legend || {};
-  options.plugins.legend.labels = options.plugins.legend.labels || {};
-  options.plugins.legend.labels.color = palette.text;
-  if (options.plugins.title) {
-    options.plugins.title.color = palette.text;
+  try {
+    chart.update('none');
+  } catch (err) {
+    console.error('Chart refresh failed', err);
   }
-  const scales = options.scales || {};
-  Object.keys(scales).forEach(key => {
-    const scale = scales[key] || {};
-    if (scale.ticks) {
-      scale.ticks.color = palette.text;
+}
+
+function isPlainObject(value) {
+  return Object.prototype.toString.call(value) === '[object Object]';
+}
+
+function cloneDeep(value) {
+  if (Array.isArray(value)) {
+    return value.map(cloneDeep);
+  }
+  if (isPlainObject(value)) {
+    const obj = {};
+    Object.keys(value).forEach(key => {
+      obj[key] = cloneDeep(value[key]);
+    });
+    return obj;
+  }
+  return value;
+}
+
+function mergeOptions(base, override) {
+  const result = isPlainObject(base) ? cloneDeep(base) : {};
+  if (!isPlainObject(override)) {
+    return result;
+  }
+  Object.keys(override).forEach(key => {
+    const overrideValue = override[key];
+    if (Array.isArray(overrideValue)) {
+      result[key] = cloneDeep(overrideValue);
+    } else if (isPlainObject(overrideValue)) {
+      result[key] = mergeOptions(result[key], overrideValue);
     } else {
-      scale.ticks = { color: palette.text };
-    }
-    if (scale.grid) {
-      scale.grid.color = palette.grid;
-    } else {
-      scale.grid = { color: palette.grid };
+      result[key] = overrideValue;
     }
   });
-  options.scales = scales;
-  chart.options = options;
-  chart.update('none');
+  return result;
+}
+
+function resolveChartTypes(payload) {
+  const widgetType = payload && payload.widgetType ? payload.widgetType : 'chart.js/bar';
+  const primary = widgetType.includes('/') ? widgetType.split('/').pop() : widgetType;
+  const extra = Array.isArray(payload && payload.preferredTypes) ? payload.preferredTypes : [];
+  const pipeline = [primary, ...extra, ...STABLE_CHART_TYPES];
+  const result = [];
+  pipeline.forEach(type => {
+    if (type && !result.includes(type)) {
+      result.push(type);
+    }
+  });
+  return result.length ? result : ['bar'];
+}
+
+function describeChartType(type) {
+  return CHART_TYPE_LABELS[type] || type || '图表';
+}
+
+function setChartDegradeNote(card, fromType, toType) {
+  if (!card) return;
+  card.setAttribute('data-chart-state', 'degraded');
+  let note = card.querySelector('.chart-note');
+  if (!note) {
+    note = document.createElement('p');
+    note.className = 'chart-note';
+    card.appendChild(note);
+  }
+  note.textContent = `${describeChartType(fromType)}渲染失败，已自动切换为${describeChartType(toType)}以确保兼容。`;
+}
+
+function clearChartDegradeNote(card) {
+  if (!card) return;
+  card.removeAttribute('data-chart-state');
+  const note = card.querySelector('.chart-note');
+  if (note) {
+    note.remove();
+  }
+}
+
+function createFallbackTable(labels, datasets) {
+  if (!Array.isArray(datasets) || !datasets.length) {
+    return null;
+  }
+  const primaryDataset = datasets.find(ds => Array.isArray(ds && ds.data));
+  const resolvedLabels = Array.isArray(labels) && labels.length
+    ? labels
+    : (primaryDataset && primaryDataset.data ? primaryDataset.data.map((_, idx) => `数据点 ${idx + 1}`) : []);
+  if (!resolvedLabels.length) {
+    return null;
+  }
+  const table = document.createElement('table');
+  const thead = document.createElement('thead');
+  const headRow = document.createElement('tr');
+  const categoryHeader = document.createElement('th');
+  categoryHeader.textContent = '类别';
+  headRow.appendChild(categoryHeader);
+  datasets.forEach((dataset, index) => {
+    const th = document.createElement('th');
+    th.textContent = dataset && dataset.label ? dataset.label : `系列${index + 1}`;
+    headRow.appendChild(th);
+  });
+  thead.appendChild(headRow);
+  table.appendChild(thead);
+  const tbody = document.createElement('tbody');
+  resolvedLabels.forEach((label, rowIdx) => {
+    const row = document.createElement('tr');
+    const labelCell = document.createElement('td');
+    labelCell.textContent = label;
+    row.appendChild(labelCell);
+    datasets.forEach(dataset => {
+      const cell = document.createElement('td');
+      const series = dataset && Array.isArray(dataset.data) ? dataset.data[rowIdx] : undefined;
+      if (typeof series === 'number') {
+        cell.textContent = series.toLocaleString();
+      } else if (series !== undefined && series !== null && series !== '') {
+        cell.textContent = series;
+      } else {
+        cell.textContent = '—';
+      }
+      row.appendChild(cell);
+    });
+    tbody.appendChild(row);
+  });
+  table.appendChild(tbody);
+  return table;
+}
+
+function renderChartFallback(canvas, payload, reason) {
+  const card = canvas.closest('.chart-card') || canvas.parentElement;
+  if (!card) return;
+  clearChartDegradeNote(card);
+  const wrapper = canvas.parentElement && canvas.parentElement.classList && canvas.parentElement.classList.contains('chart-container')
+    ? canvas.parentElement
+    : null;
+  if (wrapper) {
+    wrapper.style.display = 'none';
+  } else {
+    canvas.style.display = 'none';
+  }
+  let fallback = card.querySelector('.chart-fallback[data-dynamic="true"]');
+  let prebuilt = false;
+  if (!fallback) {
+    fallback = card.querySelector('.chart-fallback');
+    if (fallback) {
+      prebuilt = fallback.hasAttribute('data-prebuilt');
+    }
+  }
+  if (!fallback) {
+    fallback = document.createElement('div');
+    fallback.className = 'chart-fallback';
+    fallback.setAttribute('data-dynamic', 'true');
+    card.appendChild(fallback);
+  } else if (!prebuilt) {
+    fallback.innerHTML = '';
+  }
+  const titleFromOptions = payload && payload.props && payload.props.options &&
+    payload.props.options.plugins && payload.props.options.plugins.title &&
+    payload.props.options.plugins.title.text;
+  const fallbackTitle = titleFromOptions ||
+    (payload && payload.props && payload.props.title) ||
+    (payload && payload.widgetId) ||
+    canvas.getAttribute('id') ||
+    '图表';
+  const existingNotice = fallback.querySelector('.chart-fallback__notice');
+  if (existingNotice) {
+    existingNotice.remove();
+  }
+  const notice = document.createElement('p');
+  notice.className = 'chart-fallback__notice';
+  notice.textContent = `${fallbackTitle}：图表未能渲染，已展示表格数据${reason ? `（${reason}）` : ''}`;
+  fallback.insertBefore(notice, fallback.firstChild || null);
+  if (!prebuilt) {
+    const table = createFallbackTable(
+      payload && payload.data && payload.data.labels,
+      payload && payload.data && payload.data.datasets
+    );
+    if (table) {
+      fallback.appendChild(table);
+    }
+  }
+  fallback.style.display = 'block';
+  card.setAttribute('data-chart-state', 'fallback');
+}
+
+function buildChartOptions(payload) {
+  const rawLegend = payload && payload.props ? payload.props.legend : undefined;
+  let legendConfig;
+  if (isPlainObject(rawLegend)) {
+    legendConfig = mergeOptions({
+      display: rawLegend.display !== false,
+      position: rawLegend.position || 'top'
+    }, rawLegend);
+  } else {
+    legendConfig = {
+      display: rawLegend === 'hidden' ? false : true,
+      position: typeof rawLegend === 'string' ? rawLegend : 'top'
+    };
+  }
+  const baseOptions = {
+    responsive: true,
+    maintainAspectRatio: false,
+    plugins: {
+      legend: legendConfig
+    }
+  };
+  if (payload && payload.props && payload.props.title) {
+    baseOptions.plugins.title = {
+      display: true,
+      text: payload.props.title
+    };
+  }
+  const overrideOptions = payload && payload.props && payload.props.options;
+  return mergeOptions(baseOptions, overrideOptions);
+}
+
+function instantiateChart(ctx, payload, optionsTemplate, type) {
+  const data = cloneDeep(payload && payload.data ? payload.data : {});
+  const config = {
+    type,
+    data,
+    options: cloneDeep(optionsTemplate)
+  };
+  return new Chart(ctx, config);
 }
 
 function hydrateCharts() {
-  if (typeof Chart === 'undefined') {
-    return;
-  }
   document.querySelectorAll('canvas[data-config-id]').forEach(canvas => {
     const configScript = document.getElementById(canvas.dataset.configId);
     if (!configScript) return;
@@ -1143,33 +1468,51 @@ function hydrateCharts() {
       payload = JSON.parse(configScript.textContent);
     } catch (err) {
       console.error('Widget JSON 解析失败', err);
+      renderChartFallback(canvas, { widgetId: canvas.dataset.configId }, '配置解析失败');
       return;
     }
-    const chartType = (payload.widgetType || 'chart.js/bar').split('/').pop();
+    if (typeof Chart === 'undefined') {
+      renderChartFallback(canvas, payload, 'Chart.js 未加载');
+      return;
+    }
+    const chartTypes = resolveChartTypes(payload);
     const ctx = canvas.getContext('2d');
-    const baseOptions = {
-      responsive: true,
-      maintainAspectRatio: false,
-      plugins: {
-        legend: {
-          display: payload.props && payload.props.legend !== 'hidden',
-          position: (payload.props && payload.props.legend) || 'top'
-        },
-        title: payload.props && payload.props.title ? {
-          display: true,
-          text: payload.props.title
-        } : undefined
+    if (!ctx) {
+      renderChartFallback(canvas, payload, 'Canvas 初始化失败');
+      return;
+    }
+    const card = canvas.closest('.chart-card') || canvas.parentElement;
+    const optionsTemplate = buildChartOptions(payload);
+    const desiredType = chartTypes[0];
+    let chartInstance = null;
+    let selectedType = null;
+    let lastError;
+    for (const type of chartTypes) {
+      try {
+        chartInstance = instantiateChart(ctx, payload, optionsTemplate, type);
+        selectedType = type;
+        break;
+      } catch (err) {
+        lastError = err;
+        console.error('图表渲染失败', type, err);
       }
-    };
-    const mergedOptions = Object.assign({}, baseOptions, payload.props && payload.props.options ? payload.props.options : {});
-    const config = {
-      type: chartType,
-      data: payload.data || {},
-      options: mergedOptions
-    };
-    const chart = new Chart(ctx, config);
-    chartRegistry.push(chart);
-    applyChartTheme(chart);
+    }
+    if (chartInstance) {
+      chartRegistry.push(chartInstance);
+      try {
+        applyChartTheme(chartInstance);
+      } catch (err) {
+        console.error('主题同步失败', selectedType || desiredType || payload && payload.widgetType || 'chart', err);
+      }
+      if (selectedType && selectedType !== desiredType) {
+        setChartDegradeNote(card, desiredType, selectedType);
+      } else {
+        clearChartDegradeNote(card);
+      }
+    } else {
+      const reason = lastError && lastError.message ? lastError.message : '';
+      renderChartFallback(canvas, payload, reason);
+    }
   });
 }
 
@@ -1222,17 +1565,5 @@ document.addEventListener('DOMContentLoaded', () => {
 </script>
 """.strip()
 
-    # ====== Utils ======
-
-    @staticmethod
-    def _escape_html(value: Any) -> str:
-        """HTML内容转义工具，避免XSS"""
-        return html.escape(str(value)) if value is not None else ""
-
-    @staticmethod
-    def _escape_attr(value: Any) -> str:
-        """HTML属性值转义工具"""
-        return html.escape(str(value), quote=True) if value is not None else ""
-
 
 __all__ = ["HTMLRenderer"]
diff --git a/ReportEngine/utils/config.py b/ReportEngine/utils/config.py
index 06e38b2..ffa7f2a 100644
--- a/ReportEngine/utils/config.py
+++ b/ReportEngine/utils/config.py
@@ -25,6 +25,9 @@ class Settings(BaseSettings):
     DOCUMENT_IR_OUTPUT_DIR: str = Field(
         "final_reports/ir", description="整本IR/Manifest输出目录"
     )
+    CHAPTER_JSON_MAX_ATTEMPTS: int = Field(
+        2, description="章节JSON解析失败时的最大尝试次数"
+    )
     TEMPLATE_DIR: str = Field("ReportEngine/report_template", description="多模板目录")
     API_TIMEOUT: float = Field(900.0, description="单API超时时间（秒）")
     MAX_RETRY_DELAY: float = Field(180.0, description="最大重试间隔（秒）")
@@ -52,6 +55,7 @@ def print_config(config: Settings):
     message += f"最大内容长度: {config.MAX_CONTENT_LENGTH}\n"
     message += f"输出目录: {config.OUTPUT_DIR}\n"
     message += f"章节JSON目录: {config.CHAPTER_OUTPUT_DIR}\n"
+    message += f"章节JSON最大尝试次数: {config.CHAPTER_JSON_MAX_ATTEMPTS}\n"
     message += f"整本IR目录: {config.DOCUMENT_IR_OUTPUT_DIR}\n"
     message += f"模板目录: {config.TEMPLATE_DIR}\n"
     message += f"API 超时时间: {config.API_TIMEOUT} 秒\n"
diff --git a/templates/index.html b/templates/index.html
index eb39fcb..1080959 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -1027,6 +1027,49 @@
             display: none;
         }
 
+        .report-stream-line {
+            font-size: 12px;
+            margin-bottom: 4px;
+            display: flex;
+            align-items: center;
+            gap: 8px;
+            line-height: 1.5;
+        }
+
+        .report-stream-line .timestamp {
+            color: #cccccc;
+            min-width: 60px;
+        }
+
+        .report-stream-line .stream-badge {
+            border: 1px solid #444444;
+            padding: 1px 6px;
+            font-size: 10px;
+            text-transform: uppercase;
+            color: #ffffff;
+            letter-spacing: 0.5px;
+        }
+
+        .report-stream-line .line-text {
+            flex: 1;
+        }
+
+        .report-stream-line.chunk {
+            color: #8fd5ff;
+        }
+
+        .report-stream-line.warn {
+            color: #ffd166;
+        }
+
+        .report-stream-line.error {
+            color: #ff6b6b;
+        }
+
+        .report-stream-line.success {
+            color: #80ffb5;
+        }
+
         .report-loading {
             display: flex;
             align-items: center;
@@ -1165,6 +1208,9 @@
         let systemStarted = false;
         let systemStarting = false;
         let configModalLocked = false;
+        let socketConnected = false;
+        let reportStreamConnected = false;
+        let backendReachable = false;
 
         const CONFIG_ENDPOINT = '/api/config';
         const SYSTEM_STATUS_ENDPOINT = '/api/system/status';
@@ -1276,6 +1322,7 @@
             setInterval(updateTime, 1000);
             checkStatus();
             setInterval(checkStatus, 5000);
+            startConnectionProbe();
             
             // 初始化密码切换功能（事件委托，只需调用一次）
             attachConfigPasswordToggles();
@@ -1308,12 +1355,14 @@
             socket = io();
 
             socket.on('connect', function() {
-                updateConnectionStatus('已连接');
+                socketConnected = true;
+                refreshConnectionStatus();
                 socket.emit('request_status');
             });
 
             socket.on('disconnect', function() {
-                updateConnectionStatus('连接断开');
+                socketConnected = false;
+                refreshConnectionStatus();
             });
 
             socket.on('console_output', function(data) {
@@ -2255,10 +2304,38 @@
             fetch('/api/status')
             .then(response => response.json())
             .then(data => {
+                backendReachable = true;
                 updateAppStatus(data);
+                refreshConnectionStatus();
             })
             .catch(error => {
                 console.error('状态检查失败:', error);
+                backendReachable = false;
+                refreshConnectionStatus();
+            });
+        }
+
+        function startConnectionProbe() {
+            if (connectionProbeTimer) {
+                clearInterval(connectionProbeTimer);
+            }
+            probeBackendConnection();
+            connectionProbeTimer = setInterval(probeBackendConnection, CONNECTION_PROBE_INTERVAL);
+        }
+
+        function probeBackendConnection() {
+            fetch('/api/report/status?heartbeat=1', { cache: 'no-store' })
+            .then(response => {
+                if (!response.ok) throw new Error('heartbeat failed');
+                return response.json();
+            })
+            .then(() => {
+                backendReachable = true;
+                refreshConnectionStatus();
+            })
+            .catch(() => {
+                backendReachable = false;
+                refreshConnectionStatus();
             });
         }
 
@@ -2279,9 +2356,15 @@
             updateEmbeddedPage(currentApp);
         }
 
-        // 更新连接状态
-        function updateConnectionStatus(status) {
-            document.getElementById('connectionStatus').textContent = status;
+        // 根据当前的Socket/SSE状态刷新底部连接指示
+        function refreshConnectionStatus() {
+            const statusEl = document.getElementById('connectionStatus');
+            if (!statusEl) return;
+            if (socketConnected || reportStreamConnected || backendReachable) {
+                statusEl.textContent = '已连接';
+            } else {
+                statusEl.textContent = '连接断开';
+            }
         }
 
         // 更新时间
@@ -2738,6 +2821,14 @@
         // Report Engine 相关函数
         let reportTaskId = null;
         let reportPollingInterval = null;
+        let reportEventSource = null;
+        let reportAutoPreviewLoaded = false;
+        let reportStreamReconnectTimer = null;
+        let reportStreamRetryDelay = 3000;
+        let streamHeartbeatTimeout = null;
+        let streamHeartbeatInterval = null;
+        let connectionProbeTimer = null;
+        const CONNECTION_PROBE_INTERVAL = 15000;
 
         // 加载报告界面
         function loadReportInterface() {
@@ -2811,6 +2902,8 @@
             
             reportContent.innerHTML = interfaceHTML;
             initializeReportControls();
+            resetReportStreamOutput('等待新的Report任务启动...');
+            updateReportStreamStatus('idle');
             
             // 立即更新状态信息
             updateEngineStatusDisplay(statusData);
@@ -2818,8 +2911,22 @@
             // 如果有当前任务，显示任务状态
             if (statusData.current_task) {
                 updateTaskProgressStatus(statusData.current_task);
+                if (statusData.current_task.status === 'running') {
+                    reportTaskId = statusData.current_task.task_id;
+                    reportAutoPreviewLoaded = false;
+                    if (window.EventSource) {
+                        openReportStream(reportTaskId);
+                    } else {
+                        startProgressPolling(reportTaskId);
+                    }
+                } else if (statusData.current_task.status === 'completed') {
+                    lastCompletedReportTask = statusData.current_task;
+                    updateDownloadButtonState(statusData.current_task);
+                }
             } else {
                 updateDownloadButtonState(null);
+                safeCloseReportStream();
+                reportTaskId = null;
             }
         }
 
@@ -3054,10 +3161,13 @@
             
             // 重置日志计数器，因为后台会清空日志文件
             reportLogLineCount = 0;
+            reportAutoPreviewLoaded = false;
+            safeCloseReportStream(true);
             
             // 清空控制台显示
             const consoleOutput = document.getElementById('consoleOutput');
             consoleOutput.innerHTML = '<div class="console-line">[系统] 开始生成报告，日志已重置</div>';
+            resetReportStreamOutput('Report Engine 正在调度任务...');
             
             setGenerateButtonState(true);
 
@@ -3099,14 +3209,21 @@
                         refreshReportLog();
                     }, 500);
                     
-                    // 开始轮询任务状态
-                    startProgressPolling(data.task_id);
+                    appendReportStreamLine('任务创建成功，正在建立流式连接...', 'info', { force: true });
+                    if (window.EventSource) {
+                        openReportStream(reportTaskId);
+                    } else {
+                        startProgressPolling(data.task_id);
+                    }
                 } else {
                     updateTaskProgressStatus(null, 'error', '启动失败: ' + data.error);
                     // 重置标志允许重新尝试
                     autoGenerateTriggered = false;
                     reportTaskId = null;
                     setGenerateButtonState(false);
+                    appendReportStreamLine('任务启动失败: ' + (data.error || '未知错误'), 'error');
+                    updateReportStreamStatus('error');
+                    safeCloseReportStream();
                 }
             })
             .catch(error => {
@@ -3116,6 +3233,9 @@
                 autoGenerateTriggered = false;
                 reportTaskId = null;
                 setGenerateButtonState(false);
+                appendReportStreamLine('任务启动阶段异常: ' + error.message, 'error');
+                updateReportStreamStatus('error');
+                safeCloseReportStream();
             });
         }
 
@@ -3147,6 +3267,7 @@
                         
                         // 自动显示报告
                         viewReport(taskId);
+                        reportAutoPreviewLoaded = true;
                         
                         // 重置自动生成标志，允许下次有新内容时自动生成
                         autoGenerateTriggered = false;
@@ -3225,6 +3346,319 @@
             updateTaskProgressStatus(task);
         }
 
+        // ====== Report Engine SSE流式辅助函数 ======
+        // 重置流式日志入口，将提示语写入控制台，保持与右侧黑框一致
+        function resetReportStreamOutput(message = '等待新的Report任务启动...') {
+            appendReportStreamLine(message, 'info', { badge: 'REPORT', force: true });
+        }
+
+        // 根据状态同步流式指示灯，与后端心跳保持一致
+        function updateReportStreamStatus(state) {
+            if (state === 'connected') {
+                reportStreamConnected = true;
+            } else if (['idle', 'error', 'connecting', 'reconnecting'].includes(state)) {
+                reportStreamConnected = false;
+            }
+
+            const statusEl = document.getElementById('reportStreamStatus');
+            if (statusEl) {
+                const textMap = {
+                    idle: '未连接',
+                    connecting: '连接中',
+                    connected: '实时更新中',
+                    reconnecting: '等待重连',
+                    error: '已断开'
+                };
+                statusEl.textContent = textMap[state] || state;
+                statusEl.dataset.state = state;
+            }
+
+            refreshConnectionStatus();
+        }
+
+        // 往黑色控制台输出区域追加一条流式日志
+        function appendReportStreamLine(message, level = 'info', options = {}) {
+            const consoleOutput = document.getElementById('consoleOutput');
+            if (!consoleOutput) return;
+
+            if (level === 'chunk' && !options.force) {
+                return; // 章节内容流式写入不再逐条输出
+            }
+
+            const line = document.createElement('div');
+            line.className = `console-line report-stream-line ${level}`;
+
+            const timestampSpan = document.createElement('span');
+            timestampSpan.className = 'timestamp';
+            timestampSpan.textContent = new Date().toLocaleTimeString('zh-CN');
+            line.appendChild(timestampSpan);
+
+            if (options.badge) {
+                const badge = document.createElement('span');
+                badge.className = 'stream-badge';
+                badge.textContent = options.badge;
+                line.appendChild(badge);
+            }
+
+            const textSpan = document.createElement('span');
+            textSpan.className = 'line-text';
+            textSpan.textContent = message;
+            line.appendChild(textSpan);
+
+            consoleOutput.appendChild(line);
+            consoleOutput.scrollTop = consoleOutput.scrollHeight;
+        }
+
+        function startStreamHeartbeat() {
+            clearStreamHeartbeat();
+            const emitHeartbeat = () => {
+                appendReportStreamLine('Report Engine 正在流式生成，请耐心等待...', 'info', { badge: 'REPORT', force: true });
+            };
+
+            const scheduleFirstTick = () => {
+                const now = Date.now();
+                const msToNextMinute = 60000 - (now % 60000);
+                streamHeartbeatTimeout = setTimeout(() => {
+                    emitHeartbeat();
+                    streamHeartbeatInterval = setInterval(emitHeartbeat, 60000);
+                }, msToNextMinute);
+            };
+
+            scheduleFirstTick();
+        }
+
+        function clearStreamHeartbeat() {
+            if (streamHeartbeatTimeout) {
+                clearTimeout(streamHeartbeatTimeout);
+                streamHeartbeatTimeout = null;
+            }
+            if (streamHeartbeatInterval) {
+                clearInterval(streamHeartbeatInterval);
+                streamHeartbeatInterval = null;
+            }
+        }
+
+        // 建立SSE连接，实时订阅Report Engine推送
+        function openReportStream(taskId, isRetry = false) {
+            if (!taskId) return;
+            if (!window.EventSource) {
+                appendReportStreamLine('浏览器不支持SSE，已自动回退为轮询模式', 'warn', { badge: 'SSE', force: true });
+                updateReportStreamStatus('error');
+                clearStreamHeartbeat();
+                startProgressPolling(taskId);
+                return;
+            }
+            if (reportPollingInterval) {
+                clearInterval(reportPollingInterval);
+                reportPollingInterval = null;
+            }
+            if (reportEventSource && reportEventSource.__taskId === taskId) {
+                if (reportEventSource.readyState !== EventSource.CLOSED) {
+                    return;
+                }
+                safeCloseReportStream(true, true);
+            } else if (reportEventSource) {
+                safeCloseReportStream(true, true);
+            }
+
+            if (reportStreamReconnectTimer) {
+                clearTimeout(reportStreamReconnectTimer);
+                reportStreamReconnectTimer = null;
+            }
+
+            if (!isRetry) {
+                reportStreamRetryDelay = 3000;
+            }
+
+            updateReportStreamStatus('connecting');
+            appendReportStreamLine(
+                isRetry ? '尝试重连Report Engine流式通道...' : '正在建立Report Engine流式连接...',
+                'info',
+                { badge: 'SSE', force: true }
+            );
+
+            reportEventSource = new EventSource(`/api/report/stream/${taskId}`);
+            reportEventSource.__taskId = taskId;
+            reportEventSource.onopen = () => {
+                reportStreamRetryDelay = 3000;
+                updateReportStreamStatus('connected');
+                appendReportStreamLine(isRetry ? 'SSE重连成功' : 'Report Engine流式连接已建立', 'success', { badge: 'SSE' });
+                startStreamHeartbeat();
+            };
+            reportEventSource.onerror = () => {
+                appendReportStreamLine('检测到网络抖动，SSE正在等待自动重连...', 'warn', { badge: 'SSE' });
+                updateReportStreamStatus('reconnecting');
+                clearStreamHeartbeat();
+                safeCloseReportStream(true, true);
+                scheduleReportStreamReconnect(taskId);
+            };
+
+            const events = ['status', 'stage', 'chapter_status', 'chapter_chunk', 'warning', 'html_ready', 'completed', 'error', 'heartbeat'];
+            events.forEach(evt => {
+                reportEventSource.addEventListener(evt, (event) => dispatchReportStreamEvent(evt, event));
+            });
+            reportEventSource.onmessage = (event) => dispatchReportStreamEvent(event.type || 'message', event);
+        }
+
+        // 关闭SSE连接，可根据场景选择是否立即重置指示灯
+        function safeCloseReportStream(keepIndicator = false, preserveRetryDelay = false) {
+            if (reportEventSource) {
+                reportEventSource.close();
+                reportEventSource = null;
+            }
+            if (reportStreamReconnectTimer) {
+                clearTimeout(reportStreamReconnectTimer);
+                reportStreamReconnectTimer = null;
+            }
+            clearStreamHeartbeat();
+            if (!keepIndicator) {
+                updateReportStreamStatus('idle');
+            } else {
+                reportStreamConnected = false;
+                refreshConnectionStatus();
+            }
+            if (!preserveRetryDelay) {
+                reportStreamRetryDelay = 3000;
+            }
+        }
+
+        function scheduleReportStreamReconnect(taskId) {
+            if (!taskId || reportStreamReconnectTimer) {
+                return;
+            }
+            reportStreamReconnectTimer = setTimeout(() => {
+                reportStreamReconnectTimer = null;
+                if (reportTaskId === taskId) {
+                    openReportStream(taskId, true);
+                }
+            }, reportStreamRetryDelay);
+            reportStreamRetryDelay = Math.min(reportStreamRetryDelay * 2, 15000);
+        }
+
+        // 统一的事件派发入口，负责解析JSON并交给业务处理
+        function dispatchReportStreamEvent(eventType, event) {
+            try {
+                const data = JSON.parse(event.data);
+                handleReportStreamEvent(eventType, data);
+            } catch (error) {
+                console.warn('解析流式事件失败:', error);
+            }
+        }
+
+        // 结合事件类型输出控件/状态，确保网络抖动时也能及时反馈
+        function handleReportStreamEvent(eventType, eventData) {
+            if (!eventData) return;
+            const payload = eventData.payload || {};
+            const task = payload.task;
+
+            if (eventType === 'status' && task) {
+                updateTaskProgressStatus(task);
+                reportTaskId = task.status === 'running' ? task.task_id : null;
+                if (task.status === 'completed') {
+                    lastCompletedReportTask = task;
+                    setGenerateButtonState(false);
+                } else if (task.status === 'running') {
+                    setGenerateButtonState(true);
+                }
+            }
+
+            switch (eventType) {
+                case 'stage':
+                    appendReportStreamLine(
+                        payload.message || `阶段: ${payload.stage || ''}`,
+                        'info',
+                        {
+                            badge: payload.stage || '阶段',
+                            genericMessage: 'Report Engine 正在逐步生成，请耐心等待...'
+                        }
+                    );
+                    break;
+                case 'chapter_status':
+                    appendReportStreamLine(
+                        `${payload.title || payload.chapterId || '章节'} ${payload.status === 'completed' ? '已完成' : '生成中'}`,
+                        payload.status === 'completed' ? 'success' : 'info',
+                        {
+                            badge: '章节',
+                            genericMessage: payload.status === 'completed'
+                                ? `${payload.title || payload.chapterId || '章节'} 已完成`
+                                : '章节流式生成中，请稍候...'
+                        }
+                    );
+                    break;
+                case 'chapter_chunk':
+                    if (payload.delta) {
+                        appendReportStreamLine(
+                            formatStreamChunk(payload.delta),
+                            'chunk',
+                            {
+                                badge: payload.title || payload.chapterId || '章节流',
+                                genericMessage: '章节内容流式写入中...'
+                            }
+                        );
+                    }
+                    break;
+                case 'warning':
+                    appendReportStreamLine(payload.message || '检测到可重试的网络波动', 'warn');
+                    break;
+                case 'html_ready':
+                    appendReportStreamLine('HTML渲染完成，正在刷新预览...', 'success');
+                    if (task) {
+                        updateDownloadButtonState(task);
+                    }
+                    if (eventData.task_id && !reportAutoPreviewLoaded) {
+                        viewReport(eventData.task_id);
+                        reportAutoPreviewLoaded = true;
+                    }
+                    break;
+                case 'completed':
+                    appendReportStreamLine(payload.message || '任务完成', 'success');
+                    safeCloseReportStream();
+                    reportTaskId = null;
+                    setGenerateButtonState(false);
+                    if (task) {
+                        lastCompletedReportTask = task;
+                        updateDownloadButtonState(task);
+                    }
+                    if (eventData.task_id && !reportAutoPreviewLoaded) {
+                        viewReport(eventData.task_id);
+                        reportAutoPreviewLoaded = true;
+                    }
+                    break;
+                case 'cancelled':
+                    appendReportStreamLine(payload.message || '任务已取消', 'warn');
+                    safeCloseReportStream();
+                    updateReportStreamStatus('idle');
+                    reportTaskId = null;
+                    setGenerateButtonState(false);
+                    break;
+                case 'error':
+                    appendReportStreamLine(payload.message || '任务失败', 'error');
+                    safeCloseReportStream();
+                    updateReportStreamStatus('error');
+                    reportTaskId = null;
+                    setGenerateButtonState(false);
+                    break;
+                case 'heartbeat':
+                    updateReportStreamStatus('connected');
+                    appendReportStreamLine(payload.message || '流式连接正常，请稍候...', 'info', {
+                        badge: 'SSE',
+                        genericMessage: '流式连接正常，请耐心等待...'
+                    });
+                    break;
+                default:
+                    if (payload.message) {
+                        appendReportStreamLine(payload.message, 'info');
+                    }
+                    break;
+            }
+        }
+
+        // 清洗流式chunk，裁剪多余空白，避免影响UI
+        function formatStreamChunk(text) {
+            if (!text) return '';
+            return text.replace(/\s+/g, ' ').trim().slice(0, 200);
+        }
+
         // 查看报告
         function viewReport(taskId) {
             const reportPreview = document.getElementById('reportPreview');
@@ -3435,4 +3869,4 @@
         }
     </script>
 </body>
-</html>
\ No newline at end of file
+</html>