diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 574cc09..9b3ab7b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -138,11 +138,25 @@ jobs:
           pattern: tianshanos-firmware-*
           path: firmware
 
+      - name: Resolve release tag
+        id: release_tag
+        run: |
+          if [ "${{ github.event_name }}" = "release" ]; then
+            TAG="${{ github.event.release.tag_name }}"
+          elif [[ "${GITHUB_REF}" == refs/tags/* ]]; then
+            TAG="${GITHUB_REF_NAME}"
+          else
+            VERSION="${{ needs.build.outputs.version }}"
+            TAG="v${VERSION%%+*}"
+          fi
+          echo "tag=$TAG" >> "$GITHUB_OUTPUT"
+          echo "Release tag: $TAG"
+
       - name: Check if release already exists (main branch)
         if: github.ref == 'refs/heads/main'
         id: check
         run: |
-          TAG="v${{ needs.build.outputs.version }}"
+          TAG="${{ steps.release_tag.outputs.tag }}"
           if gh release view "$TAG" 2>/dev/null; then
             echo "skip=true" >> $GITHUB_OUTPUT
             echo "⏭️ Release $TAG already exists, skipping"
@@ -154,8 +168,8 @@ jobs:
         if: github.event_name == 'release' || startsWith(github.ref, 'refs/tags/') || (github.ref == 'refs/heads/main' && steps.check.outputs.skip != 'true')
         uses: softprops/action-gh-release@v2
         with:
-          tag_name: ${{ github.event_name == 'release' && github.event.release.tag_name || startsWith(github.ref, 'refs/tags/') && github.ref_name || format('v{0}', needs.build.outputs.version) }}
-          name: ${{ github.event_name == 'release' && github.event.release.tag_name || startsWith(github.ref, 'refs/tags/') && github.ref_name || format('v{0}', needs.build.outputs.version) }}
+          tag_name: ${{ steps.release_tag.outputs.tag }}
+          name: ${{ steps.release_tag.outputs.tag }}
           files: |
             firmware/**/*.bin
             firmware/**/flasher_args.json
diff --git a/README.md b/README.md
index 7d57ded..14a4c6b 100644
--- a/README.md
+++ b/README.md
@@ -157,8 +157,8 @@ esptool.py --chip esp32s3 -p /dev/ttyACM0 write_flash \
 
 ## 当前状态
 
-**版本**: 0.4.6
-**阶段**: Phase 39 完成 - LPMU 接入上层网络
+**版本**: 0.4.7
+**阶段**: Phase 40 完成 - 自动风扇温度失效降速优化
 
 ### 已完成功能
 
diff --git a/components/ts_drivers/src/ts_fan.c b/components/ts_drivers/src/ts_fan.c
index e127e98..8c3cf39 100644
--- a/components/ts_drivers/src/ts_fan.c
+++ b/components/ts_drivers/src/ts_fan.c
@@ -39,6 +39,7 @@
 #define FAN_AUTO_GAIN_MAX              2.00f
 #define FAN_AUTO_RISE_RATE_PER_SEC     12.0f
 #define FAN_AUTO_FALL_RATE_PER_SEC     0.30f
+#define FAN_AUTO_STALE_DUTY            25
 #define FAN_AUTO_HISTORY_SIZE          32
 
 /*===========================================================================*/
@@ -405,16 +406,19 @@ static esp_err_t apply_adaptive_auto(fan_instance_t *fan, const ts_temp_data_t *
     int16_t control_temp = TS_TEMP_DEFAULT_VALUE;
     int16_t guard_temp = TS_TEMP_DEFAULT_VALUE;
     uint8_t old_duty = fan->current_duty;
+    bool recovered_from_stale = fan->temp_stale;
 
     if (!get_adaptive_temperatures(temp_data, &control_temp, &guard_temp)) {
         fan->temp_stale = true;
         fan->auto_state = TS_FAN_AUTO_STATE_STALE;
         fan->response_observing = false;
         fan->auto_fall_credit = 0.0f;
-        fan->target_duty = 100;
+        fan->guard_active = false;
+        fan->guard_release_since_ms = 0;
+        fan->target_duty = FAN_AUTO_STALE_DUTY;
         fan->predicted_temperature = fan->control_temperature;
         fan->last_auto_update_ms = now_ms;
-        return update_pwm(fan, 100);
+        return update_pwm(fan, FAN_AUTO_STALE_DUTY);
     }
 
     fan->temp_stale = false;
@@ -494,11 +498,16 @@ static esp_err_t apply_adaptive_auto(fan_instance_t *fan, const ts_temp_data_t *
 
     bool allow_down = (guard_temp <= FAN_AUTO_GUARD_RELEASE_TEMP) &&
                       (!slope_valid || fan->slope_c_per_min <= 0.0f);
-    if (target < fan->current_duty && !allow_down) {
+    if (target < fan->current_duty && !allow_down && !recovered_from_stale) {
         target = fan->current_duty;
     }
 
-    target = apply_auto_rate_limit(fan, target, allow_down, now_ms);
+    if (recovered_from_stale && target < fan->current_duty) {
+        fan->auto_fall_credit = 0.0f;
+        fan->last_auto_update_ms = now_ms;
+    } else {
+        target = apply_auto_rate_limit(fan, target, allow_down, now_ms);
+    }
     fan->target_duty = target;
     esp_err_t ret = update_pwm(fan, target);
 
diff --git a/components/ts_webui/web/css/style.css b/components/ts_webui/web/css/style.css
index 1f2150f..863c703 100644
--- a/components/ts_webui/web/css/style.css
+++ b/components/ts_webui/web/css/style.css
@@ -3001,13 +3001,32 @@ button.btn-gray:hover,
 .fan-header {
     display: flex;
     justify-content: space-between;
-    align-items: center;
+    align-items: flex-start;
+    gap: 12px;
     margin-bottom: 16px;
 }
 
+.fan-header-main {
+    display: flex;
+    align-items: center;
+    flex: 1;
+    flex-wrap: wrap;
+    gap: 8px 10px;
+    min-width: 0;
+}
+
+.fan-header-actions {
+    display: flex;
+    align-items: center;
+    flex: 0 0 auto;
+    gap: 8px;
+}
+
 .fan-title {
     font-size: 1.1rem;
     font-weight: 600;
+    line-height: 1.5;
+    white-space: nowrap;
 }
 
 .fan-status-badge {
@@ -3038,26 +3057,23 @@ button.btn-gray:hover,
 }
 
 .fan-auto-info-btn {
-    width: 24px;
-    height: 24px;
+    width: 22px;
+    height: 22px;
     padding: 0;
-    margin-left: 6px;
-    border: 1px solid var(--border-color);
+    border: none;
     border-radius: 50%;
-    background: var(--bg-elevated);
+    background: transparent;
     color: var(--text-muted);
     display: inline-flex;
     align-items: center;
     justify-content: center;
-    vertical-align: 16px;
     cursor: pointer;
     transition: all var(--t-fast);
 }
 
 .fan-auto-info-btn:hover {
     color: var(--text-primary);
-    background: var(--bg-card);
-    border-color: var(--text-muted);
+    background: transparent;
 }
 
 .fan-auto-info-btn i {
@@ -3094,9 +3110,10 @@ button.btn-gray:hover,
     flex-wrap: wrap;
     gap: 6px;
     align-items: center;
-    margin: -4px 0 14px;
+    margin: 0;
     font-size: 0.75rem;
     color: var(--text-light);
+    min-width: 0;
 }
 
 .fan-auto-meta span {
diff --git a/components/ts_webui/web/js/app.js b/components/ts_webui/web/js/app.js
index 82e4560..5bf7863 100644
--- a/components/ts_webui/web/js/app.js
+++ b/components/ts_webui/web/js/app.js
@@ -1484,40 +1484,46 @@ function updateFanInfo(data) {
             const _autoHelpTitleSafe = typeof escapeHtml === 'function' ? escapeHtml(_autoHelpTitle) : _autoHelpTitle;
             const autoStateLabels = {
                 idle: typeof t === 'function' ? t('fanPage.autoStateIdle') : '待机',
-                baseline: typeof t === 'function' ? t('fanPage.autoStateBaseline') : '基线',
-                active: typeof t === 'function' ? t('fanPage.autoStateActive') : '自适应',
-                guard: typeof t === 'function' ? t('fanPage.autoStateGuard') : '保护',
-                stale: typeof t === 'function' ? t('fanPage.autoStateStale') : '失效',
+                baseline: typeof t === 'function' ? t('fanPage.autoStateBaseline') : '按曲线运行',
+                active: typeof t === 'function' ? t('fanPage.autoStateActive') : '自适应调速',
+                guard: typeof t === 'function' ? t('fanPage.autoStateGuard') : '保护介入',
+                stale: typeof t === 'function' ? t('fanPage.autoStateStale') : '温度失效',
                 unknown: typeof t === 'function' ? t('fanPage.autoStateUnknown') : '未知'
             };
             const autoState = fan.auto_state || 'unknown';
             const autoStateText = autoStateLabels[autoState] || autoState;
-            const guardLabel = typeof t === 'function' ? t('fanPage.guardTempShort') : '保护';
-            const predictedLabel = typeof t === 'function' ? t('fanPage.predictedTempShort') : '预测';
+            const guardLabel = typeof t === 'function' ? t('fanPage.guardTempShort') : '安全参考温度';
+            const predictedLabel = typeof t === 'function' ? t('fanPage.predictedTempShort') : '45秒预测';
+            const slopeLabel = typeof t === 'function' ? t('fanPage.slopeTempShort') : '升温速度';
+            const slopeUnit = typeof t === 'function' ? t('fanPage.slopeTempUnit') : '°C/分钟';
             const autoMeta = hasAutoTelemetry ? `
                 <div class="fan-auto-meta ${fan.guard_active ? 'is-guard' : ''} ${fan.temp_stale ? 'is-stale' : ''}">
                     <span>${autoStateText}</span>
                     ${typeof fan.guard_temperature === 'number' ? `<span>${guardLabel} ${fan.guard_temperature.toFixed(1)}°C</span>` : ''}
                     ${typeof fan.predicted_temperature === 'number' ? `<span>${predictedLabel} ${fan.predicted_temperature.toFixed(1)}°C</span>` : ''}
-                    ${typeof fan.slope_c_per_min === 'number' ? `<span>${fan.slope_c_per_min.toFixed(2)}°C/min</span>` : ''}
+                    ${typeof fan.slope_c_per_min === 'number' ? `<span>${slopeLabel} ${fan.slope_c_per_min.toFixed(2)}${slopeUnit}</span>` : ''}
                 </div>
             ` : '';
             
             return `
             <div class="fan-card ${isOff ? 'is-off' : ''}">
                 <div class="fan-header">
-                    <span class="fan-title">${_fanTitle}</span>
-                    <span class="fan-status-badge" style="background:${currentMode.color}20;color:${currentMode.color}" title="${currentMode.label}">
-                        <i class="${currentMode.iconRi}"></i>
-                    </span>
+                    <div class="fan-header-main">
+                        <span class="fan-title">${_fanTitle}</span>
+                        ${autoMeta}
+                    </div>
+                    <div class="fan-header-actions">
+                        ${mode === 'auto' ? `<button type="button" class="fan-auto-info-btn" onclick="showFanAutoHelpModal()" title="${_autoHelpTitleSafe}" aria-label="${_autoHelpTitleSafe}"><i class="ri-information-line"></i></button>` : ''}
+                        <span class="fan-status-badge" style="background:${currentMode.color}20;color:${currentMode.color}" title="${currentMode.label}">
+                            <i class="${currentMode.iconRi}"></i>
+                        </span>
+                    </div>
                 </div>
                 <div class="fan-speed-display">
                     <span class="fan-speed-num">${displayDuty}</span>
                     <span class="fan-speed-percent">%</span>
-                    ${mode === 'auto' ? `<button type="button" class="fan-auto-info-btn" onclick="showFanAutoHelpModal()" title="${_autoHelpTitleSafe}" aria-label="${_autoHelpTitleSafe}"><i class="ri-information-line"></i></button>` : ''}
                     ${rpm > 0 ? `<div class="fan-rpm-small">${rpm} RPM</div>` : ''}
                 </div>
-                ${autoMeta}
                 <div class="fan-mode-tabs">
                     <button class="fan-mode-tab ${mode === 'off' ? 'active off' : ''}" onclick="setFanMode(${fan.id}, 'off')">${_off}</button>
                     <button class="fan-mode-tab ${mode === 'manual' ? 'active manual' : ''}" onclick="setFanMode(${fan.id}, 'manual')">${_manual}</button>
diff --git a/components/ts_webui/web/js/lang/en-US.js b/components/ts_webui/web/js/lang/en-US.js
index dd6a32e..908c3e0 100644
--- a/components/ts_webui/web/js/lang/en-US.js
+++ b/components/ts_webui/web/js/lang/en-US.js
@@ -2735,13 +2735,15 @@ if (typeof i18n !== 'undefined') i18n.registerLanguage('en-US', {
         editTempCurve: 'Edit Temperature Curve',
         manualModeHint: 'Switch to manual mode to adjust',
         autoStateIdle: 'Idle',
-        autoStateBaseline: 'Baseline',
-        autoStateActive: 'Adaptive',
-        autoStateGuard: 'Guard',
-        autoStateStale: 'Stale',
+        autoStateBaseline: 'Following curve',
+        autoStateActive: 'Adaptive speed',
+        autoStateGuard: 'Protection active',
+        autoStateStale: 'Temperature stale',
         autoStateUnknown: 'Unknown',
-        guardTempShort: 'Guard',
-        predictedTempShort: 'Predicted',
+        guardTempShort: 'Safety reference',
+        predictedTempShort: '45s forecast',
+        slopeTempShort: 'Rise rate',
+        slopeTempUnit: '°C/min',
         autoHelpTitle: 'What makes Auto mode different?',
         autoHelpIntro: 'Auto mode adjusts fan speed based on the current cooling condition of the device, instead of only following a fixed curve.',
         autoHelpCurveDiff: 'Curve mode works like a fixed rule table: when temperature reaches a point, the fan uses the matching speed. It is stable and predictable when you want to define the cooling behavior yourself.',
diff --git a/components/ts_webui/web/js/lang/zh-CN.js b/components/ts_webui/web/js/lang/zh-CN.js
index 4256320..ac87c54 100644
--- a/components/ts_webui/web/js/lang/zh-CN.js
+++ b/components/ts_webui/web/js/lang/zh-CN.js
@@ -2720,13 +2720,15 @@ if (typeof i18n !== 'undefined') i18n.registerLanguage('zh-CN', {
         editTempCurve: '编辑温度曲线',
         manualModeHint: '切换到手动模式后可调节',
         autoStateIdle: '待机',
-        autoStateBaseline: '基线',
-        autoStateActive: '自适应',
-        autoStateGuard: '保护',
-        autoStateStale: '失效',
+        autoStateBaseline: '按曲线运行',
+        autoStateActive: '自适应调速',
+        autoStateGuard: '保护介入',
+        autoStateStale: '温度失效',
         autoStateUnknown: '未知',
-        guardTempShort: '保护',
-        predictedTempShort: '预测',
+        guardTempShort: '安全参考温度',
+        predictedTempShort: '45秒预测',
+        slopeTempShort: '升温速度',
+        slopeTempUnit: '°C/分钟',
         autoHelpTitle: '自动模式有什么不同？',
         autoHelpIntro: '自动模式会根据设备当前的散热状态实时调节风扇，而不是只按一条固定曲线运行。',
         autoHelpCurveDiff: '曲线模式更像一张固定规则表：温度到多少，风扇就转到多少。它稳定、可预期，适合你想手动定义散热策略的场景。',
diff --git a/version.txt b/version.txt
index ef52a64..f905682 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.4.6
+0.4.7