diff --git a/wwwroot/api/task_io.dspy b/wwwroot/api/task_io.dspy
index 8eabcab..86064a2 100644
--- a/wwwroot/api/task_io.dspy
+++ b/wwwroot/api/task_io.dspy
@@ -22,6 +22,7 @@ _state_colors = {
     'paused': '#f0a040',
     'cancelled': '#64748b', 'qc_review': '#8b5cf6',
     'qc_rejected': '#dc2626',
+    'verify_failed': '#f0a040',
 }
 
 if not task_id:
diff --git a/wwwroot/api/workspace_delete.dspy b/wwwroot/api/workspace_delete.dspy
index b512b35..a3a9d09 100644
--- a/wwwroot/api/workspace_delete.dspy
+++ b/wwwroot/api/workspace_delete.dspy
@@ -1,8 +1,19 @@
 # workspace_delete.dspy - 删除工作空间文件
 
 import os
+from urllib.parse import unquote
 
-file_id = (params_kw or {}).get('id', '').strip()
+def _decode_id(s):
+    for _ in range(4):
+        if '%' not in s:
+            break
+        s2 = unquote(s)
+        if s2 == s:
+            break
+        s = s2
+    return s
+
+file_id = _decode_id((params_kw or {}).get('id', '').strip())
 
 uid = await get_user()
 if not uid:
diff --git a/wwwroot/api/workspace_file.dspy b/wwwroot/api/workspace_file.dspy
index f99df6d..e5d1876 100644
--- a/wwwroot/api/workspace_file.dspy
+++ b/wwwroot/api/workspace_file.dspy
@@ -1,10 +1,21 @@
 # workspace_file.dspy - 提供工作空间文件（媒体流 / 下载）
 
 import os
-from urllib.parse import quote
+from urllib.parse import quote, unquote
 from aiohttp.web_fileresponse import FileResponse
 
-file_id = (params_kw or {}).get('id', '').strip()
+def _decode_id(s):
+    # 前端 id 可能被多层编码，循环解码到无 % 为止（2026-09-03 中文文件名根因）
+    for _ in range(4):
+        if '%' not in s:
+            break
+        s2 = unquote(s)
+        if s2 == s:
+            break
+        s = s2
+    return s
+
+file_id = _decode_id((params_kw or {}).get('id', '').strip())
 download = (params_kw or {}).get('download', '').strip()
 
 uid = await get_user()
diff --git a/wwwroot/api/workspace_files.dspy b/wwwroot/api/workspace_files.dspy
index 4e26261..d3cc5da 100644
--- a/wwwroot/api/workspace_files.dspy
+++ b/wwwroot/api/workspace_files.dspy
@@ -2,8 +2,19 @@
 
 import os
 import json as _json
+from urllib.parse import unquote
 
-folder_id = (params_kw or {}).get('id', '').strip()
+def _decode_id(s):
+    for _ in range(4):
+        if '%' not in s:
+            break
+        s2 = unquote(s)
+        if s2 == s:
+            break
+        s = s2
+    return s
+
+folder_id = _decode_id((params_kw or {}).get('id', '').strip())
 
 uid = await get_user()
 if not uid:
diff --git a/wwwroot/api/workspace_open.dspy b/wwwroot/api/workspace_open.dspy
index ae1e945..210321d 100644
--- a/wwwroot/api/workspace_open.dspy
+++ b/wwwroot/api/workspace_open.dspy
@@ -2,9 +2,19 @@
 
 import os
 import json as _json
-from urllib.parse import quote
+from urllib.parse import quote, unquote
 
-file_id = (params_kw or {}).get('id', '').strip()
+def _decode_id(s):
+    for _ in range(4):
+        if '%' not in s:
+            break
+        s2 = unquote(s)
+        if s2 == s:
+            break
+        s = s2
+    return s
+
+file_id = _decode_id((params_kw or {}).get('id', '').strip())
 
 uid = await get_user()
 if not uid:
diff --git a/wwwroot/api/workspace_tree.dspy b/wwwroot/api/workspace_tree.dspy
index d824f35..bbf9d8a 100644
--- a/wwwroot/api/workspace_tree.dspy
+++ b/wwwroot/api/workspace_tree.dspy
@@ -3,6 +3,15 @@
 import os
 
 node_id = (params_kw or {}).get('id', '').strip()
+# 前端 id 可能被多层编码，循环解码（2026-09-03 中文目录名根因）
+from urllib.parse import unquote as _unq
+for _ in range(4):
+    if '%' not in node_id:
+        break
+    _s2 = _unq(node_id)
+    if _s2 == node_id:
+        break
+    node_id = _s2
 
 uid = await get_user()
 if not uid:
diff --git a/wwwroot/api/workspace_upload.dspy b/wwwroot/api/workspace_upload.dspy
index 1c0367a..bfdd05b 100644
--- a/wwwroot/api/workspace_upload.dspy
+++ b/wwwroot/api/workspace_upload.dspy
@@ -2,8 +2,19 @@
 
 import os
 import base64
+from urllib.parse import unquote
 
-folder_id = (params_kw or {}).get('id', '').strip()
+def _decode_id(s):
+    for _ in range(4):
+        if '%' not in s:
+            break
+        s2 = unquote(s)
+        if s2 == s:
+            break
+        s = s2
+    return s
+
+folder_id = _decode_id((params_kw or {}).get('id', '').strip())
 filename = (params_kw or {}).get('filename', '').strip()
 filedata = (params_kw or {}).get('filedata', '').strip()
 
diff --git a/wwwroot/api/workspace_view.dspy b/wwwroot/api/workspace_view.dspy
index cdbb3a3..ba83519 100644
--- a/wwwroot/api/workspace_view.dspy
+++ b/wwwroot/api/workspace_view.dspy
@@ -1,10 +1,22 @@
-# workspace_view.dspy - 查看文件：txt/md 用 MdWidget 渲染，其他文档下载查看
+# workspace_view.dspy - 查看文件：txt/md/json 用 MdWidget 渲染，其他文档下载查看
 
 import os
 import json as _json
-from urllib.parse import quote
+from urllib.parse import quote, unquote
 
-file_id = (params_kw or {}).get('id', '').strip()
+def _decode_id(s):
+    # 前端 id 可能被多层编码（Tree 懒加载一次 + encodeURIComponent 一次），
+    # 循环解码到无 % 为止，兼容任意编码层数（2026-09-03 中文文件名"文件不存在"根因）
+    for _ in range(4):
+        if '%' not in s:
+            break
+        s2 = unquote(s)
+        if s2 == s:
+            break
+        s = s2
+    return s
+
+file_id = _decode_id((params_kw or {}).get('id', '').strip())
 
 uid = await get_user()
 if not uid:
@@ -39,9 +51,28 @@ ext = os.path.splitext(name)[1].lower()
 
 file_url = entire_url("/pipeline-sdlc/api/workspace_file.dspy") + "?id=" + quote(file_id) + (("&session_id=" + session_id) if session_id else "")
 
-# txt/md → VScrollPanel 包裹 MdWidget 渲染（可滚动，长文档不截断）
-md_exts = ['.md', '.txt']
+# txt/md/json → VScrollPanel 包裹 MdWidget 渲染（可滚动，长文档不截断；json 直接显示正文不下载）
+md_exts = ['.md', '.txt', '.json']
 if ext in md_exts:
+    if ext == '.json':
+        # json 包代码块渲染（marked 按 pre 显示正文）
+        try:
+            with open(full_path, 'r', encoding='utf-8', errors='replace') as fh:
+                body = fh.read(200000)
+        except Exception as e:
+            return {"widgettype": "Message", "options": {"title": "查看失败", "message": str(e)[:200]}}
+        return {
+            "widgettype": "PopupWindow",
+            "options": {"title": name + " (查看)", "width": "85%", "height": "85%", "auto_open": True, "resizable": True},
+            "subwidgets": [{
+                "widgettype": "VScrollPanel",
+                "options": {"css": "filler", "width": "100%", "height": "100%"},
+                "subwidgets": [{
+                    "widgettype": "MdWidget",
+                    "options": {"mdtext": "```json\n" + body + "\n```", "width": "100%"}
+                }]
+            }]
+        }
     return {
         "widgettype": "PopupWindow",
         "options": {"title": name + " (查看)", "width": "85%", "height": "85%", "auto_open": True, "resizable": True},