feat(ui): 全项目暗黑模式适配 — 加 theme 变量 + 替换全部硬编码颜色

新增主题变量 (light + dark 两套):
- --success-rgb / --danger / --danger-rgb (utils/theme.js)

全部硬编码 #XXX / rgba 颜色统一改主题变量:
- progress-ring 加 trackColor prop,默认 #EEEEEE
  (canvas 不能直接读 CSS var,需要 caller 传字面颜色)
- ui-modal sheet 背景 #FFFFFF → var(--card-bg), 加底部 padding 避开 Dock TabBar
- ui-modal handle #DDD → var(--bg-soft)
- ui-btn --danger 文字 #E53935 → var(--danger), 边框 rgba(229,57,53,...) → rgba(var(--danger-rgb),...)
- calendar-heatmap 三个 #999/#333 文字色 → var(--text-secondary)/var(--text)
- index picker: preset/custom input 背景 #F5F5F5 → var(--bg-soft), label #666 → var(--text-secondary)
- index done-badge 绿色 → var(--success-rgb), pending-text #CCC → var(--text-secondary)
- records empty/hint #CCC/#E0E0E0 → var(--text-secondary), danger 红 → var(--danger)
- settings plan-editor-sheet 背景 #FFFFFF → var(--card-bg), avatar 背景, handle, editor-input, preview 全部跟进
- leaderboard 金/铜背景 #FFF7E6/#FFF1E6 → rgba 半透明 (dark mode 下不刺眼)

Tab bar inactive 图标重新根据 dark mode 切换颜色 (#999999 light / #98989F dark)

leaderboard.json 删除 backgroundColor: #F5F5F5 覆盖,让 theme.json 接管

故意保留:
- 各 .wxss 中渐变按钮上的 #FFFFFF 文字色
- 排行榜金/铜文字色 #FA8C16/#D46B08 (视觉符号约定)
- 各页 data 中 orange theme 默认值 (onShow 后被 themeMod 覆盖)

components/calendar-heatmap/calendar-heatmap.wxss

@@ -15,7 +15,7 @@
   width: 56rpx;
   text-align: center;
   font-size: 22rpx;
-  color: #999;
+  color: var(--text-secondary);
 }
 
 .calendar-grid {
@@ -44,7 +44,7 @@
 
 .day-num {
   font-size: 22rpx;
-  color: #333;
+  color: var(--text);
   font-weight: 500;
 }
 
@@ -58,7 +58,7 @@
 
 .legend-label {
   font-size: 20rpx;
-  color: #999;
+  color: var(--text-secondary);
 }
 
 .legend-block {

components/progress-ring/progress-ring.js

@@ -8,7 +8,10 @@ Component({
     ringWidth: { type: Number, value: 14 },
     status: { type: String, value: 'idle' },
     primaryColor: { type: String, value: '#FF6B35' },
-    primaryLightColor: { type: String, value: '#FF8C5A' }
+    primaryLightColor: { type: String, value: '#FF8C5A' },
+    // Track (background ring) color. Caller passes a darker shade in dark mode
+    // so the ring isn't an eye-searing light circle on a dark background.
+    trackColor: { type: String, value: '#EEEEEE' }
   },
 
   data: {
@@ -25,7 +28,7 @@ Component({
       })
     },
 
-    'remaining, duration, size, ringWidth, primaryColor'() {
+    'remaining, duration, size, ringWidth, primaryColor, trackColor'() {
       this._draw()
     }
   },
@@ -54,7 +57,7 @@ Component({
       const ctx = this._ctx
       if (!ctx) return
 
-      const { size, ringWidth, duration, remaining, primaryColor } = this.data
+      const { size, ringWidth, duration, remaining, primaryColor, trackColor } = this.data
       const dpr = this._dpr
 
       const w = size * dpr
@@ -69,7 +72,7 @@ Component({
       // track ring
       ctx.beginPath()
       ctx.arc(cx, cy, radius, 0, Math.PI * 2)
-      ctx.strokeStyle = '#EEEEEE'
+      ctx.strokeStyle = trackColor
       ctx.lineWidth = lw
       ctx.lineCap = 'round'
       ctx.stroke()

components/ui-btn/ui-btn.wxss

@@ -55,14 +55,14 @@
 }
 
 .ui-btn--danger {
-  background: #FFFFFF;
+  background: var(--card-bg);
-  color: #E53935;
+  color: var(--danger);
-  border: 2rpx solid rgba(229, 57, 53, 0.3);
+  border: 2rpx solid rgba(var(--danger-rgb), 0.3);
 }
 
 .ui-btn--danger:active:not(.is-disabled) {
-  background: rgba(229, 57, 53, 0.05);
+  background: rgba(var(--danger-rgb), 0.05);
-  border-color: #E53935;
+  border-color: var(--danger);
 }
 
 .ui-btn--ghost {

components/ui-modal/ui-modal.wxss

@@ -16,7 +16,7 @@
 
 .ui-modal__body {
   position: relative;
-  background: #FFFFFF;
+  background: var(--card-bg);
   box-sizing: border-box;
 }
 
@@ -24,7 +24,9 @@
   width: 100%;
   border-radius: 32rpx 32rpx 0 0;
   padding: 28rpx 32rpx 40rpx;
-  padding-bottom: calc(40rpx + env(safe-area-inset-bottom));
+  /* bottom sheet 需要避开 Dock TabBar(高度 ~110rpx + 40rpx 间隙),
+     否则最底下的按钮会被 toolbar 遮挡。150rpx = dock 高度 + margin。 */
+  padding-bottom: calc(150rpx + env(safe-area-inset-bottom));
   animation: uiModalSlideUp 0.3s cubic-bezier(0.32, 0.72, 0, 1);
 }
 
@@ -39,7 +41,7 @@
 .ui-modal__handle {
   width: 64rpx;
   height: 8rpx;
-  background: #DDD;
+  background: var(--bg-soft);
   border-radius: 4rpx;
   margin: 0 auto 24rpx;
 }

custom-tab-bar/index.js

@@ -5,21 +5,23 @@ const themeMod = require('../utils/theme')
 const _initialTheme = themeMod.getCurrentTheme()
 const _initialThemeStyle = themeMod.getThemeStyle(_initialTheme)
 
-// SVG icons as data URIs. We use two variants per icon:
+// Inactive icon color follows the dark mode: matches --text-secondary in dark
-//   - *Fill*: solid filled (active state, theme color baked in at module load)
+// mode and a softer gray in light mode. Kept in sync with utils/theme.js so
-//   - *Line*: outlined (inactive state, neutral gray)
+// icons don't sit awkwardly on the dock background in either theme.
-// Themes are 5 fixed colors so we can bake the active color in at module init.
+const LIGHT_INACTIVE = '#999999'
-// If the user changes theme, the component re-renders via pageLifetimes.show.
+const DARK_INACTIVE = '#98989F'
 
-// Solid (active) color from current theme
+const _getInactiveColor = () => {
-const _activeColor = _initialTheme.primary
+  const darkMod = require('../utils/darkMode')
-// Inactive color
+  return darkMod.getInitialDarkMode() ? DARK_INACTIVE : LIGHT_INACTIVE
-const _inactiveColor = '#999999'
+}
+
+const _initialInactiveColor = _getInactiveColor()
 
 const _svg = (path, fill) =>
   'data:image/svg+xml,' + encodeURIComponent(
     '<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="' + fill + '">' +
-    path + '</svg>'
+      path + '</svg>'
   )
 
 // 24x24 Material-style paths
@@ -30,18 +32,18 @@ const PATH_CALENDAR_LINE = '<path d="M19 4h-2V2h-2v2H9V2H7v2H5C3.9 4 3 4.9 3 6v1
 const PATH_RANK = '<path d="M7.5 21H2V9h5.5v12zm7.25-14h-5.5v14h5.5V7zM22 11h-5.5v10H22V11z"/>'
 const PATH_RANK_LINE = '<path d="M7.5 21H2V9h5.5v12zm7.25-14h-5.5v14h5.5V7zM22 11h-5.5v10H22V11z" fill-rule="evenodd"/>'
 const PATH_SETTINGS = '<path d="M19.14 12.94c.04-.3.06-.61.06-.94 0-.32-.02-.64-.07-.94l2.03-1.58a.49.49 0 00.12-.61l-1.92-3.32a.49.49 0 00-.59-.22l-2.39.96c-.5-.38-1.03-.7-1.62-.94l-.36-2.54a.484.484 0 00-.48-.41h-3.84c-.24 0-.43.17-.47.41l-.36 2.54c-.59.24-1.13.57-1.62.94l-2.39-.96a.49.49 0 00-.59.22L2.74 8.87c-.12.21-.08.47.12.61l2.03 1.58c-.05.3-.07.62-.07.94s.02.64.07.94l-2.03 1.58a.49.49 0 00-.12.61l1.92 3.32c.12.22.37.29.59.22l2.39-.96c.5.38 1.03.7 1.62.94l.36 2.54c.05.24.24.41.48.41h3.84c.24 0 .44-.17.47-.41l.36-2.54c.59-.24 1.13-.56 1.62-.94l2.39.96c.22.08.47 0 .59-.22l1.92-3.32c.12-.22.07-.47-.12-.61l-2.01-1.58zM12 15.6c-1.98 0-3.6-1.62-3.6-3.6s1.62-3.6 3.6-3.6 3.6 1.62 3.6 3.6-1.62 3.6-3.6 3.6z"/>'
-const PATH_SETTINGS_LINE = '<path d="M19.14 12.94c.04-.3.06-.61.06-.94 0-.32-.02-.64-.07-.94l2.03-1.58a.49.49 0 00.12-.61l-1.92-3.32a.49.49 0 00-.59-.22l-2.39.96c-.5-.38-1.03-.7-1.62-.94l-.36-2.54a.484.484 0 00-.48-.41h-3.84c-.24 0-.43.17-.47.41l-.36 2.54c-.59.24-1.13.57-1.62.94l-2.39-.96a.49.49 0 00-.59.22L2.74 8.87c-.12.21-.08.47.12.61l2.03 1.58c-.05.3-.07.62-.07.94s.02.64.07.94l-2.03 1.58a.49.49 0 00-.12.61l1.92 3.32c.12.22.37.29.59.22l2.39-.96c.5.38 1.03.7 1.62.94l.36 2.54c.05.24.24.41.48.41h3.84c.24 0 .44-.17.47-.41l.36-2.54c.59-.24 1.13-.56 1.62-.94l2.39.96c.22.08.47 0 .59-.22l1.92-3.32c.12-.22.07-.47-.12-.61l-2.01-1.58zM12 15.6c-1.98 0-3.6-1.62-3.6-3.6s1.62-3.6 3.6-3.6 3.6 1.62 3.6 3.6-1.62 3.6-3.6 3.6z" fill-rule="evenodd"/>'
+const PATH_SETTINGS_LINE = '<path d="M19.14 12.94c.04-.3.06-.61.06-.94 0-.32-.02-.64-.07-.94l2.03-1.58a.49.49 0 00-.12-.61l-1.92-3.32a.49.49 0 00-.59-.22l-2.39.96c-.5-.38-1.03-.7-1.62-.94l-.36-2.54a.484.484 0 00-.48-.41h-3.84c-.24 0-.43.17-.47.41l-.36 2.54c-.59.24-1.13.57-1.62.94l-2.39-.96a.49.49 0 00-.59.22L2.74 8.87c-.12.21-.08.47.12.61l2.03 1.58c-.05.3-.07.62-.07.94s.02.64.07.94l-2.03 1.58a.49.49 0 00-.12.61l1.92 3.32c.12.22.37.29.59.22l2.39-.96c.5.38 1.03.7 1.62.94l.36 2.54c.05.24.24.41.48.41h3.84c.24 0 .44-.17.47-.41l.36-2.54c.59-.24 1.13-.56 1.62-.94l2.39.96c.22.08.47 0 .59-.22l1.92-3.32c.12-.22.07-.47-.12-.61l-2.01-1.58zM12 15.6c-1.98 0-3.6-1.62-3.6-3.6s1.62-3.6 3.6-3.6 3.6 1.62 3.6 3.6-1.62 3.6-3.6 3.6z" fill-rule="evenodd"/>'
 
-const _buildIcons = (activeHex) => {
+const _buildIcons = (activeHex, inactiveHex) => {
   const a = activeHex
   return {
-    home: _svg(PATH_HOME_LINE, _inactiveColor),
+    home: _svg(PATH_HOME_LINE, inactiveHex),
     homeFill: _svg(PATH_HOME, a),
-    calendar: _svg(PATH_CALENDAR_LINE, _inactiveColor),
+    calendar: _svg(PATH_CALENDAR_LINE, inactiveHex),
     calendarFill: _svg(PATH_CALENDAR, a),
-    rank: _svg(PATH_RANK_LINE, _inactiveColor),
+    rank: _svg(PATH_RANK_LINE, inactiveHex),
     rankFill: _svg(PATH_RANK, a),
-    settings: _svg(PATH_SETTINGS_LINE, _inactiveColor),
+    settings: _svg(PATH_SETTINGS_LINE, inactiveHex),
     settingsFill: _svg(PATH_SETTINGS, a)
   }
 }
@@ -51,12 +53,15 @@ Component({
     selected: 0,
     theme: _initialTheme,
     themeStyle: _initialThemeStyle,
-    svgIcons: _buildIcons(_initialTheme.primary)
+    svgIcons: _buildIcons(_initialTheme.primary, _initialInactiveColor)
   },
 
   lifetimes: {
     attached() {
       themeMod.applyThemeToPage(this)
+      // Rebuild icons in case the user changed theme/dark mode since module load
+      const theme = themeMod.getCurrentTheme()
+      this.setData({ svgIcons: _buildIcons(theme.primary, _getInactiveColor()) })
     }
   },
 
@@ -64,7 +69,7 @@ Component({
     show() {
       themeMod.applyThemeToPage(this)
       const theme = themeMod.getCurrentTheme()
-      this.setData({ svgIcons: _buildIcons(theme.primary) })
+      this.setData({ svgIcons: _buildIcons(theme.primary, _getInactiveColor()) })
     }
   },
 

pages/index/index.wxss

@@ -202,7 +202,7 @@
 .done-badge {
   display: inline-flex;
   align-items: center;
-  background: rgba(76, 175, 80, 0.08);
+  background: rgba(var(--success-rgb), 0.08);
   padding: 10rpx 24rpx;
   border-radius: 24rpx;
 }
@@ -227,7 +227,7 @@
 
 .pending-text {
   font-size: 26rpx;
-  color: #CCC;
+  color: var(--text-secondary);
   line-height: 1;
 }
 
@@ -281,7 +281,7 @@
 
 .preset-item {
   flex: 0 0 calc(33.33% - 12rpx);
-  background: #F5F5F5;
+  background: var(--bg-soft);
   border-radius: 16rpx;
   padding: 20rpx 0;
   text-align: center;
@@ -326,14 +326,14 @@
 
 .custom-label {
   font-size: 28rpx;
-  color: #666;
+  color: var(--text-secondary);
   line-height: 1;
 }
 
 .custom-input {
   width: 160rpx;
   height: 64rpx;
-  background: #F5F5F5;
+  background: var(--bg-soft);
   border-radius: 12rpx;
   text-align: center;
   font-size: 32rpx;

pages/leaderboard/leaderboard.json

@@ -1,6 +1,5 @@
 {
   "navigationBarTitleText": "排行榜",
   "enablePullDownRefresh": true,
-  "backgroundColor": "#F5F5F5",
   "usingComponents": {}
 }

pages/leaderboard/leaderboard.wxss

@@ -112,9 +112,9 @@
   margin-right: 16rpx;
 }
 
-.rank-num.gold   { background: #FFF7E6; color: #FA8C16; font-size: 36rpx; }
+.rank-num.gold   { background: rgba(250, 140, 22, 0.15); color: #FA8C16; font-size: 36rpx; }
 .rank-num.silver { background: var(--bg-soft); color: #8C8C8C; font-size: 36rpx; }
-.rank-num.bronze { background: #FFF1E6; color: #D46B08; font-size: 36rpx; }
+.rank-num.bronze { background: rgba(212, 107, 8, 0.15); color: #D46B08; font-size: 36rpx; }
 
 .rank-avatar {
   width: 64rpx;

pages/records/records.wxss

@@ -108,7 +108,7 @@
 
 .history-hint {
   font-size: 22rpx;
-  color: #CCC;
+  color: var(--text-secondary);
 }
 
 .empty-state {
@@ -126,14 +126,14 @@
 }
 
 .empty-text {
-  color: #CCC;
+  color: var(--text-secondary);
   font-size: 28rpx;
   margin-bottom: 8rpx;
 }
 
 .empty-sub {
   font-size: 24rpx;
-  color: #E0E0E0;
+  color: var(--text-secondary);
 }
 
 .history-list {
@@ -195,8 +195,8 @@
   gap: 6rpx;
   padding: 0 18rpx;
   height: 56rpx;
-  background: rgba(229, 57, 53, 0.1);
+  background: rgba(var(--danger-rgb), 0.1);
-  border: 2rpx solid rgba(229, 57, 53, 0.2);
+  border: 2rpx solid rgba(var(--danger-rgb), 0.2);
   border-radius: 28rpx;
   flex-shrink: 0;
   transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
@@ -204,8 +204,8 @@
 
 .history-delete-btn:active {
   transform: scale(0.92);
-  background: rgba(229, 57, 53, 0.2);
+  background: rgba(var(--danger-rgb), 0.2);
-  border-color: rgba(229, 57, 53, 0.4);
+  border-color: rgba(var(--danger-rgb), 0.4);
 }
 
 .history-delete-icon {
@@ -216,7 +216,7 @@
 
 .history-delete-text {
   font-size: 24rpx;
-  color: #E53935;
+  color: var(--danger);
   font-weight: 600;
   line-height: 1;
 }

pages/settings/settings.wxss

@@ -90,7 +90,7 @@
 .plan-radio {
   width: 40rpx;
   height: 40rpx;
-  border: 3rpx solid #DDD;
+  border: 3rpx solid var(--border);
   border-radius: 50%;
   display: flex;
   align-items: center;
@@ -240,7 +240,7 @@
   height: 120rpx;
   padding: 0;
   margin: 0;
-  background: #F5F5F5;
+  background: var(--bg-soft);
   border-radius: 50%;
   border: none;
   line-height: 1;
@@ -257,7 +257,7 @@
   height: 100%;
   border-radius: 50%;
   /* peopleFill svg is mostly transparent; give it a soft tint */
-  background: #EEE;
+  background: var(--bg-soft);
   padding: 24rpx;
   box-sizing: border-box;
 }
@@ -319,7 +319,7 @@
 
 .about-copy {
   font-size: 22rpx;
-  color: #CCCCCC;
+  color: var(--text-secondary);
 }
 
 /* ---- plan editor modal ---- */
@@ -347,7 +347,7 @@
   max-height: 88vh;
   overflow-y: auto;
   box-sizing: border-box;
-  background: #FFFFFF;
+  background: var(--card-bg);
   border-radius: 32rpx 32rpx 0 0;
   padding: 12rpx 32rpx 40rpx;
   /* Sheet is z-index 1000 above the tab bar (z-index 999), but the tab bar
@@ -361,7 +361,7 @@
 .plan-editor-handle {
   width: 64rpx;
   height: 8rpx;
-  background: #DDD;
+  background: var(--bg-soft);
   border-radius: 4rpx;
   margin: 0 auto 16rpx;
 }
@@ -409,7 +409,7 @@
 
 .editor-input {
   height: 68rpx;
-  background: #F5F5F5;
+  background: var(--bg-soft);
   border-radius: 10rpx;
   padding: 0 16rpx;
   font-size: 26rpx;
@@ -420,7 +420,7 @@
 
 .editor-preview {
   margin-top: 6rpx;
-  background: #FAFAFA;
+  background: var(--bg);
   border-radius: 14rpx;
   padding: 12rpx 16rpx;
 }
@@ -453,7 +453,7 @@
   justify-content: space-between;
   align-items: center;
   padding: 8rpx 0;
-  border-bottom: 1rpx solid #EEE;
+  border-bottom: 1rpx solid var(--border);
   font-size: 24rpx;
 }
 
@@ -498,13 +498,13 @@
 }
 
 .editor-action-reset {
-  background: #FFFFFF;
+  background: var(--card-bg);
   color: var(--text-secondary);
   border: 2rpx solid var(--border);
 }
 
 .editor-action-reset:active {
-  background: #F5F5F5;
+  background: var(--bg-soft);
 }
 
 .editor-action-save {
@@ -575,6 +575,6 @@
 }
 
 .confirm-btn--danger {
-  background: #E53935;
+  background: var(--danger);
   color: #FFFFFF;
 }

utils/theme.js

@@ -41,7 +41,7 @@ const THEMES = [
   }
 ]
 
-const BASE_VARS = '--text:#333;--text-secondary:#999;--bg:#F5F5F5;--card-bg:#FFFFFF;--border:#EEE;--success:#4CAF50;--primary:#FF6B35;--primary-light:#FF8C5A;--primary-bg:#FFF3ED;--primary-rgb:255,107,53;'
+const BASE_VARS = '--text:#333;--text-secondary:#999;--bg:#F5F5F5;--card-bg:#FFFFFF;--border:#EEE;--success:#4CAF50;--success-rgb:76,175,80;--danger:#E53935;--danger-rgb:229,57,53;--primary:#FF6B35;--primary-light:#FF8C5A;--primary-bg:#FFF3ED;--primary-rgb:255,107,53;'
 const DEFAULT_THEME_ID = 'orange'
 const THEME_KEY = 'app_theme'
 let _navColorTimer = null
@@ -97,8 +97,8 @@ 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;'
+    ? '--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:#333333;--text-secondary:#999999;--bg:#F5F5F5;--bg-gradient-start:#F5F5F5;--bg-gradient-end:#FAFAFA;--card-bg:#FFFFFF;--bg-soft:#F0F0F0;--border:#EEEEEE;--success:#4CAF50;'
+    : '--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};`
 }