fix(dark): 调亮暗黑色调 + dock 跟随暗黑切换 + 图标文字放大

- theme/app.wxss: 暗黑背景 #0F0F12->#2C2C2E,卡片 #1C1C1E->#3A3A3C,
  bg-soft/border 同步提亮,拉开卡片与背景对比(原太黑看不到卡片)
- custom-tab-bar: dock 注册 wx.onThemeChange,系统切暗黑/明亮实时跟随
  (组件不在 getCurrentPages,app.js watchDarkMode 通知不到)
- custom-tab-bar: 新增 updateTheme,settings 手动切深色时通知 dock
- custom-tab-bar.wxss: dock 图标 44->50rpx,文字 20->23rpx,未激活
  opacity 0.5->0.7(更醒目)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app.wxss

@@ -24,12 +24,12 @@ page {
   page {
     --text: #E5E5E7;
     --text-secondary: #98989F;
-    --bg: #0F0F12;
-    --bg-gradient-start: #0F0F12;
-    --bg-gradient-end: #14141A;
-    --card-bg: #1C1C1E;
-    --bg-soft: #2C2C2E;
-    --border: #2C2C2E;
+    --bg: #2C2C2E;
+    --bg-gradient-start: #2C2C2E;
+    --bg-gradient-end: #38383A;
+    --card-bg: #3A3A3C;
+    --bg-soft: #48484A;
+    --border: #48484A;
     --success: #30D158;
     --success-rgb: 48,209,88;
     --danger: #FF6B6B;

config.js

@@ -4,7 +4,7 @@
  */
 module.exports = {
   /** 应用版本号，外显在设置页「关于」 */
-  version: 'v2.6',
+  version: 'v2.7',
 
   /** 最后更新日期，外显在设置页「关于」 */
   updatedAt: '2026-07-09',

custom-tab-bar/index.js

@@ -62,6 +62,20 @@ Component({
       // Rebuild icons in case the user changed theme/dark mode since module load
       const theme = themeMod.getCurrentTheme()
       this.setData({ svgIcons: _buildIcons(theme.primary, _getInactiveColor()) })
+      // The custom tabBar isn't in getCurrentPages(), so app.js's
+      // watchDarkMode (which notifies pages) never reaches it. Listen for
+      // system theme changes ourselves so the dock flips dark/light live,
+      // not just on the next tab switch.
+      if (!this._themeChangeBound && typeof wx.onThemeChange === 'function') {
+        this._onThemeChange = () => {
+          themeMod.applyThemeToPage(this)
+          this.setData({ svgIcons: _buildIcons(themeMod.getCurrentTheme().primary, _getInactiveColor()) })
+        }
+        try {
+          wx.onThemeChange(this._onThemeChange)
+          this._themeChangeBound = true
+        } catch (e) {}
+      }
     }
   },
 
@@ -84,6 +98,12 @@ Component({
       ]
       if (index === this.data.selected) return
       wx.switchTab({ url: pages[index] })
+    },
+    // Called by settings.onSelectDarkMode - the dock isn't in
+    // getCurrentPages() so the page-loop there misses it.
+    updateTheme() {
+      themeMod.applyThemeToPage(this)
+      this.setData({ svgIcons: _buildIcons(themeMod.getCurrentTheme().primary, _getInactiveColor()) })
     }
   }
 })

custom-tab-bar/index.wxss

@@ -36,18 +36,18 @@
 }
 
 .dock-icon {
-  width: 44rpx;
-  height: 44rpx;
+  width: 50rpx;
+  height: 50rpx;
   background-size: contain;
   background-repeat: no-repeat;
   background-position: center;
-  margin-bottom: 4rpx;
-  opacity: 0.5;
+  margin-bottom: 5rpx;
+  opacity: 0.7;
   transition: opacity 0.2s ease;
 }
 
 .dock-text {
-  font-size: 20rpx;
+  font-size: 23rpx;
   color: var(--text-secondary, #999);
   line-height: 1;
   transition: color 0.2s ease;

pages/settings/settings.js

@@ -144,6 +144,11 @@ Page({
         // Tab page without method: re-apply via themeMod
         try { themeMod.applyThemeToPage(p) } catch (e) {}
       }
+      // 自定义 tabBar 不在 pages 里,单独通知它切换暗黑/明亮
+      try {
+        const tb = p.getTabBar && p.getTabBar()
+        if (tb && typeof tb.updateTheme === 'function') tb.updateTheme()
+      } catch (e) {}
     })
     themeMod.applyThemeToPage(this)
   },

utils/theme.js

@@ -97,7 +97,7 @@ const setTheme = (id) => {
 const getThemeStyle = (theme, isDark = false) => {
   const t = theme || getCurrentTheme()
   const baseVars = isDark
-    ? '--text:#E5E5E7;--text-secondary:#98989F;--bg:#0F0F12;--bg-gradient-start:#0F0F12;--bg-gradient-end:#14141A;--card-bg:#1C1C1E;--bg-soft:#2C2C2E;--border:#2C2C2E;--success:#30D158;--success-rgb:48,209,88;--danger:#FF6B6B;--danger-rgb:255,107,107;'
+    ? '--text:#E5E5E7;--text-secondary:#98989F;--bg:#2C2C2E;--bg-gradient-start:#2C2C2E;--bg-gradient-end:#38383A;--card-bg:#3A3A3C;--bg-soft:#48484A;--border:#48484A;--success:#30D158;--success-rgb:48,209,88;--danger:#FF6B6B;--danger-rgb:255,107,107;'
     : '--text:#333333;--text-secondary:#999999;--bg:#F5F5F5;--bg-gradient-start:#F5F5F5;--bg-gradient-end:#FAFAFA;--card-bg:#FFFFFF;--bg-soft:#F0F0F0;--border:#EEEEEE;--success:#4CAF50;--success-rgb:76,175,80;--danger:#E53935;--danger-rgb:229,57,53;'
   return `${baseVars}--primary:${t.primary};--primary-light:${t.primaryLight};--primary-bg:${t.primaryBg};--primary-rgb:${t.primaryRgb};`
 }