feat: v1.5 — plan editor, voice prompts, UI polish

Major features:
- Training plan editor: edit preset days/duration per plan (in-place
  override via custom_plans storage; preset ids preserved so existing
  records stay valid)
- Voice prompts at 4 fixed points during training (halfway / 30s /
  10s / done) via Tencent Cloud TTS (cloudfunctions/tts + utils/voice.js)
- Free-training button: switched from outline (transparent) to ghost
  variant (theme-tinted) for visual weight

Bug fixes:
- 4 functional pages: SVG data URIs failed to render in WeChat because
  '\#' in colors was parsed as a data-URI fragment delimiter. encode the
  whole SVG via encodeURIComponent in utils/icons.js build().
- Old records (saved before id field was added) could not be deleted
  (data-id was empty, triggered defensive guard). Backfill stable
  legacy-<month>-<index>-<duration> ids in getRecords() and persist.
- settings.js plan-row editor button event was bubbling up to the row's
  bindtap (which also fired onSelectPlan). Wrapped in catch:tap.

UI:
- Settings page: 3 hardcoded plans replaced with dynamic buildPlansList
  that overlays custom_plans on top of presets
- Plan editor: bottom-sheet modal in settings page (regular view, not
  ui-modal — WeChat custom component root element drops position:fixed
  in this runtime)
- Free-training button: rounded pill style, full-width, 24rpx gap from
  primary action; bottom sheet uses max-height: 88vh + internal scroll
- Version bumped to v1.5, last updated 2026-06-10

Removed:
- Daily reminder section (dailyReminder / reminderTime) — replaced by
  the 4 voice prompts which cover the same user need without requiring
  long-term scheduling that WeChat mini-programs can't actually do

Misc:
- utils/plan.js refactored to formula-driven: presets declare
  totalDays/startTarget/increment/cycleDays, days[] is generated. Same
  formula applies to custom plans.
- Timer _remind() guards each prompt on minimum duration so short
  free-mode sessions don't fire 'last30' at the start
- Cloud storage cloud_plans field added to data push payload; restored
  on first install via _restoreFromCloud
- .gitignore added for local AI tool caches (.reasonix/, reasonix.toml,
  .codegraph/daemon.pid)

utils/storage.js

@@ -4,11 +4,48 @@ const cloud = require('./cloud')
 const RECORDS_KEY = 'training_records'
 const SETTINGS_KEY = 'user_settings'
 const STREAK_KEY = 'current_streak'
+const CUSTOM_PLANS_KEY = 'custom_plans'
 
-const getRecords = () => wx.getStorageSync(RECORDS_KEY) || {}
+/**
+ * Backfill an `id` for any record that doesn't have one.
+ * Older records (e.g. data restored from cloud or migrated from a build
+ * that didn't yet write the id field) come in without an id, which makes
+ * delete-by-id fail with "记录数据异常". Assign a stable, deterministic id
+ * derived from the record's position + payload so the user can still
+ * delete them.
+ *
+ * Returns true if any record was patched.
+ */
+const _ensureRecordIds = (records) => {
+  if (!records || typeof records !== 'object') return false
+  let changed = false
+  Object.keys(records).forEach((month) => {
+    const list = records[month]
+    if (!Array.isArray(list)) return
+    list.forEach((r, i) => {
+      if (r && (r.id == null || r.id === '')) {
+        // month is YYYY-MM; strip the dash so the id stays a safe token
+        const m = String(month).replace(/[^0-9]/g, '')
+        r.id = `legacy-${m}-${i}-${r.duration || 0}`
+        changed = true
+      }
+    })
+  })
+  return changed
+}
+
+const getRecords = () => {
+  const records = wx.getStorageSync(RECORDS_KEY) || {}
+  if (_ensureRecordIds(records)) {
+    // Persist the backfill so subsequent calls don't re-mutate; the cloud
+    // will resync on the next saveRecord/deleteRecord.
+    try { wx.setStorageSync(RECORDS_KEY, records) } catch (e) {}
+  }
+  return records
+}
 
 const saveRecord = (record) => {
-  record.id = Date.now()
+  record.id = String(Date.now())
   const records = getRecords()
   const month = record.date.substring(0, 7)
   if (!records[month]) records[month] = []
@@ -19,12 +56,21 @@ const saveRecord = (record) => {
 }
 
 const deleteRecord = (recordId) => {
+  if (!recordId && recordId !== 0) return  // guard against undefined/null
+  const id = String(recordId)
+  if (!id || id === 'undefined' || id === 'null') return
   const records = getRecords()
+  let found = false
   Object.keys(records).forEach((month) => {
-    records[month] = records[month].filter((r) => r.id !== recordId)
+    const before = records[month].length
+    records[month] = records[month].filter((r) => String(r.id) !== id)
+    if (records[month].length < before) found = true
     if (records[month].length === 0) delete records[month]
   })
+  if (!found) return  // id not found, don't overwrite storage
   wx.setStorageSync(RECORDS_KEY, records)
+  // Re-validate streak: deleting the last record for a day should break the streak
+  validateStreak()
   cloud.pushAll()
 }
 
@@ -50,8 +96,6 @@ const getTotalStats = () => {
 
 const getSettings = () => wx.getStorageSync(SETTINGS_KEY) || {
   planId: 'beginner',
-  dailyReminder: true,
-  reminderTime: '08:00',
   voiceGuide: true,
   vibrate: true
 }
@@ -63,6 +107,75 @@ const saveSettings = (settings) => {
 
 const getStreak = () => wx.getStorageSync(STREAK_KEY) || { count: 0, lastDate: '' }
 
+/**
+ * User-customized training plans, keyed by planId (e.g. 'beginner').
+ * Each value is a full plan object built by `utils/plan.generatePlanDays`
+ * plus the editor's formula fields (startTarget / increment / cycleDays).
+ *
+ * Storage shape mirrors `getRecords()`: an object map so partial writes
+ * don't have to read+modify+write the whole collection.
+ */
+const getCustomPlans = () => {
+  const raw = wx.getStorageSync(CUSTOM_PLANS_KEY)
+  if (raw && typeof raw === 'object' && !Array.isArray(raw)) return raw
+  return {}
+}
+
+const saveCustomPlan = (planId, planData) => {
+  if (!planId) return
+  const plans = getCustomPlans()
+  plans[planId] = planData
+  wx.setStorageSync(CUSTOM_PLANS_KEY, plans)
+  cloud.pushAll()
+}
+
+const resetCustomPlan = (planId) => {
+  if (!planId) return
+  const plans = getCustomPlans()
+  if (!(planId in plans)) return
+  delete plans[planId]
+  wx.setStorageSync(CUSTOM_PLANS_KEY, plans)
+  cloud.pushAll()
+}
+
+/**
+ * Validate streak against actual training records.
+ * Call on app launch to correct any inconsistencies
+ * (e.g. after deleting the only record for a day).
+ */
+const validateStreak = () => {
+  const streak = getStreak()
+  if (!streak.lastDate) return streak
+
+  const today = getToday()
+  const yesterday = getDateOffset(today, -1)
+  const records = getRecords()
+  const allDates = new Set()
+  Object.values(records).forEach(monthRecs => {
+    monthRecs.forEach(r => allDates.add(r.date))
+  })
+
+  // If lastDate is today, check today still has records
+  if (streak.lastDate === today) {
+    if (!allDates.has(today)) {
+      // Today's records were deleted
+      if (allDates.has(yesterday)) {
+        streak.lastDate = yesterday
+        streak.count = Math.max(1, streak.count - 1)
+      } else {
+        streak.count = 0
+        streak.lastDate = ''
+      }
+      wx.setStorageSync(STREAK_KEY, streak)
+    }
+    return streak
+  }
+
+  // If lastDate is not today and not yesterday, streak is already broken
+  // (updateStreak handles reset on next training), no action needed here
+  return streak
+}
+
 const updateStreak = (date) => {
   const streak = getStreak()
   const today = date || getToday()
@@ -84,7 +197,8 @@ const updateStreak = (date) => {
 const getToday = () => formatDate(new Date())
 
 const getDateOffset = (dateStr, offset) => {
-  const d = new Date(dateStr)
+  // Use YYYY/MM/DD for iOS compatibility (YYYY-MM-DD may fail on some iOS)
+  const d = new Date(dateStr.replace(/-/g, '/'))
   d.setDate(d.getDate() + offset)
   return formatDate(d)
 }
@@ -113,10 +227,13 @@ module.exports = {
   getTotalStats,
   getSettings,
   saveSettings,
+  getCustomPlans,
+  saveCustomPlan,
+  resetCustomPlan,
   getStreak,
+  validateStreak,
   updateStreak,
   getToday,
-  formatDate,
   getDateOffset,
   getTodayRecord
 }