fix: report 429 retry + theme toggle on all pages

- LLMClient: increase retries 5→8, backoff 1s→2s, max 30s→60s for GLM rate limit recovery
- Report agent: add 3s delay between sections to avoid sustained 429
- Add theme-toggle-anchor to SimulationRun/Report/Interaction/Replay views
- All pages now have dark/light theme toggle button

backend/app/services/report_agent.py

@@ -1684,7 +1684,12 @@ class ReportAgent:
                     )
 
                 logger.info(t('report.sectionSaved', reportId=report_id, sectionNum=f"{section_num:02d}"))
-                
+
+                # 章节间延迟，避免连续请求触发 LLM 速率限制
+                if section_num < total_sections:
+                    import time
+                    time.sleep(3)
+
                 # 更新进度
                 ReportManager.update_progress(
                     report_id, "generating", 

backend/app/utils/llm_client.py

@@ -16,9 +16,9 @@ from ..config import Config
 logger = logging.getLogger('foresight.llm_client')
 
 # 重试配置（针对 429 / 5xx / 超时 / 连接错误）
-_MAX_RETRIES = 5
-_BASE_BACKOFF = 1.0  # 首次重试等 1s
-_MAX_BACKOFF = 30.0  # 单次最多等 30s
+_MAX_RETRIES = 8
+_BASE_BACKOFF = 2.0  # 首次重试等 2s
+_MAX_BACKOFF = 60.0  # 单次最多等 60s
 
 
 def _is_rate_limit_error(err: Exception) -> bool:

frontend/src/views/InteractionView.vue

@@ -28,6 +28,7 @@
 
       <div class="header-right">
         <LanguageSwitcher />
+        <div class="theme-toggle-slot" id="theme-toggle-anchor"></div>
         <div class="step-divider"></div>
         <div class="workflow-step">
           <span class="step-num">Step 5/5</span>
@@ -358,4 +359,12 @@ onMounted(() => {
 .panel-wrapper.left {
   border-right: 1px solid #EAEAEA;
 }
+.theme-toggle-slot {
+  width: 18px;
+  height: 18px;
+  flex-shrink: 0;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
 </style>

frontend/src/views/ReportView.vue

@@ -28,6 +28,7 @@
 
       <div class="header-right">
         <LanguageSwitcher />
+        <div class="theme-toggle-slot" id="theme-toggle-anchor"></div>
         <div class="step-divider"></div>
         <div class="workflow-step">
           <span class="step-num">Step 4/5</span>
@@ -356,4 +357,12 @@ onMounted(() => {
 .panel-wrapper.left {
   border-right: 1px solid #EAEAEA;
 }
+.theme-toggle-slot {
+  width: 18px;
+  height: 18px;
+  flex-shrink: 0;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
 </style>

frontend/src/views/SimulationReplayView.vue

@@ -24,6 +24,7 @@
         </div>
       </div>
       <div class="header-right">
+        <div class="theme-toggle-slot" id="theme-toggle-anchor"></div>
         <button class="icon-btn" @click="toggleAnalyst" :title="analystMode ? '切换沉浸视图' : '切换分析视图'">
           {{ analystMode ? '◫' : '▦' }}
         </button>
@@ -964,4 +965,5 @@ onUnmounted(() => {
 .task-icon { color: #4CAF50; font-weight: 700; }
 .task-label { color: #E8E8E8; flex: 1; }
 .task-progress { color: #666; }
+.theme-toggle-slot { width: 18px; height: 18px; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; }
 </style>

frontend/src/views/SimulationRunView.vue

@@ -28,6 +28,7 @@
 
       <div class="header-right">
         <LanguageSwitcher />
+        <div class="theme-toggle-slot" id="theme-toggle-anchor"></div>
         <div class="step-divider"></div>
         <div class="workflow-step">
           <span class="step-num">Step 3/5</span>
@@ -454,5 +455,13 @@ onUnmounted(() => {
 .panel-wrapper.left {
   border-right: 1px solid #EAEAEA;
 }
+.theme-toggle-slot {
+  width: 18px;
+  height: 18px;
+  flex-shrink: 0;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
 </style>