cleanup: remove old reminder system and unused crontab files

Todo management now lives entirely in skills/calendar/ via VTODO + todoman.

skills/calendar/MIGRATION.md

@@ -1,117 +0,0 @@
-# Migration: reminder_check.py → calendar todo
-
-## What's changing
-
-| Before | After |
-|--------|-------|
-| `scripts/reminder_check.py` | `skills/calendar/scripts/calendar.sh todo` |
-| `reminders/active.md` (markdown table) | `calendars/tasks/*.ics` (RFC 5545 VTODO) |
-| Local only, no sync | CalDAV sync to all devices via vdirsyncer |
-| No native reminders | VALARM triggers on phone/desktop |
-| Cron reads markdown | Cron reads .ics via todoman |
-| Custom Python parsing | todoman for robust RFC 5545 VTODO handling |
-
-## Prerequisites
-
-- [ ] Install todoman (see below)
-- [ ] Configure todoman (see below)
-- [ ] `calendar.sh todo add --dry-run` works
-- [ ] `~/.openclaw/workspace/calendars/tasks/` directory exists (auto-created by `todo add`)
-- [ ] vdirsyncer has a `cal/tasks` pair configured
-- [ ] Live tests 8-12 from `TESTING.md` pass on the Linux machine
-
-## Step 0: Install and configure todoman
-
-### Install
-
-```bash
-# Debian/Ubuntu (the agent's Linux machine)
-pip install todoman
-
-# macOS (Homebrew)
-brew install todoman
-```
-
-The CLI command is `todo`.
-
-### Configure
-
-Create `~/.config/todoman/config.py`:
-
-```python
-path = "~/.openclaw/workspace/calendars/tasks/"
-date_format = "%Y-%m-%d"
-time_format = "%H:%M"
-default_due = 24
-default_priority = 0
-humanize = True
-```
-
-### Verify
-
-```bash
-# Should list todos (or show empty list without errors)
-todo list
-```
-
-## Step 1: Migrate pending reminders
-
-Two items are pending in `reminders/active.md`:
-
-```bash
-SKILL_DIR=~/.openclaw/workspace/skills/calendar
-
-$SKILL_DIR/scripts/calendar.sh todo add \
-  --summary "跟进iui保险报销" \
-  --due "2026-03-25" \
-  --priority medium \
-  --description "确认iui（人工授精）费用保险报销进度，避免过期"
-
-$SKILL_DIR/scripts/calendar.sh todo add \
-  --summary "打电话给progyny问iui报销" \
-  --due "2026-04-04" \
-  --priority medium \
-  --description "询问iui报销相关事宜"
-```
-
-Note: `todo add` emails each item to `mail@luyx.org`. This is expected.
-
-Verify:
-```bash
-$SKILL_DIR/scripts/calendar.sh todo list
-```
-
-## Step 2: Set up cron
-
-Ask the agent to set up a daily cron job via `openclaw cron`:
-
-> Set up a daily cron at 8:00 AM PST that runs:
-> `~/.openclaw/workspace/skills/calendar/scripts/calendar.sh todo check`
-> and emails the output to mail@luyx.org with subject "📋 今日待办清单"
-
-The old `reminder_check.py` cron should be removed by the agent at the same time.
-
-## Step 3: Verify
-
-- [ ] `todo list` (todoman directly) shows both migrated items
-- [ ] `calendar.sh todo list` shows both items with Chinese priority labels
-- [ ] `vdirsyncer sync` completes without errors
-- [ ] Todos appear on phone/CalDAV client
-- [ ] Next morning's cron email arrives with the new format
-
-## Step 4: Clean up
-
-After a few days of successful operation:
-
-```bash
-# Remove old reminder system
-rm scripts/reminder_check.py
-rm -r reminders/
-```
-
-## Rollback
-
-If something goes wrong, the old system is still intact until Step 4:
-- `reminders/active.md` is unchanged
-- `scripts/reminder_check.py` still works
-- Re-add the old cron entry to restore the previous behavior

skills/calendar/scripts/cal_tool.py

@@ -436,7 +436,7 @@ def _days_until(due_val):
 
 
 def _urgency_label(days):
-    """Urgency label with emoji, matching reminder_check.py style."""
+    """Urgency label with emoji."""
     if days is None:
         return "❓ 日期未知"
     elif days < 0: