Fix "in N minutes" parsing and VHS tape errors

- Strip "in " prefix before passing to date -d (was always broken)
- Fix quickstart tape: -B3 → -B4 for resume grep (Job: is 4 lines back)
- Fix notifications tape: -f ~/backup.sh → -c (file doesn't exist)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

demo/editmode.tape

@@ -0,0 +1,78 @@
+# systab — Edit Mode with Notification Flags
+# Demonstrates the crontab-style editor with :flags syntax.
+
+Output demo/editmode.gif
+Set Shell bash
+Set Width 1200
+Set Height 600
+Set FontSize 16
+
+Set TypingSpeed 50ms
+
+Sleep 1s
+
+# First create some jobs to edit
+Type "# Create some jobs to work with"
+Enter
+Sleep 500ms
+Type "systab -t 'every 5 minutes' -c 'echo ping'"
+Enter
+Sleep 2s
+Type "systab -t daily -c '/home/user/backup.sh' -i"
+Enter
+Sleep 2s
+
+# Open edit mode with EDITOR=nano for visibility
+Type "# Open edit mode — add notifications, create and modify jobs"
+Enter
+Sleep 1s
+Type "EDITOR=nano systab -E"
+Sleep 500ms
+Enter
+Sleep 3s
+
+# In nano: navigate to the end of the file
+# Ctrl+V = page down in nano, then Down to reach last line
+Ctrl+V
+Sleep 500ms
+Down 5
+Sleep 500ms
+
+# Add a new job line with notification flags
+Type "new:i,e=admin@example.com | hourly | curl -s https://example.com/health"
+Sleep 1s
+Enter
+
+Sleep 1s
+
+# Save and exit nano
+Ctrl+O
+Sleep 500ms
+Enter
+Sleep 500ms
+Ctrl+X
+Sleep 3s
+
+# Show the result
+Type "# See the changes applied"
+Enter
+Sleep 500ms
+Type "systab -S"
+Sleep 500ms
+Enter
+Sleep 4s
+
+# Re-open edit mode to show flags are persisted
+Type "# Re-open edit mode — flags are persisted"
+Enter
+Sleep 1s
+Type "EDITOR=nano systab -E"
+Sleep 500ms
+Enter
+Sleep 3s
+
+# Just view and exit without changes
+Ctrl+X
+Sleep 2s
+
+Sleep 2s

demo/notifications.tape

@@ -0,0 +1,62 @@
+# systab — Notifications
+# Shows status-aware desktop and email notifications.
+
+Output demo/notifications.gif
+Set Shell bash
+Set Width 1200
+Set Height 600
+Set FontSize 16
+
+Set TypingSpeed 50ms
+
+Sleep 1s
+
+# Desktop notification — success case
+Type "# Desktop notification on success/failure"
+Enter
+Sleep 1s
+Type "systab -t 'in 1 minute' -c 'echo success' -i"
+Sleep 500ms
+Enter
+Sleep 2s
+
+# Desktop notification — failure case
+Type "systab -t 'in 1 minute' -c 'exit 1' -i"
+Sleep 500ms
+Enter
+Sleep 2s
+
+# Email notification
+Type "# Email notification via sendmail"
+Enter
+Sleep 1s
+Type "systab -t 'in 1 minute' -c 'echo test' -m user@example.com"
+Sleep 500ms
+Enter
+Sleep 2s
+
+# Both notifications
+Type "# Both desktop and email"
+Enter
+Sleep 1s
+Type "systab -t 'every day at 9am' -c '/home/user/backup.sh' -i -m admin@example.com"
+Sleep 500ms
+Enter
+Sleep 2s
+
+# Show the generated service file to see ExecStopPost lines
+Type "# Inspect generated service file"
+Enter
+Sleep 1s
+Type "cat ~/.config/systemd/user/systab_*.service | head -20"
+Sleep 500ms
+Enter
+Sleep 4s
+
+# Check status
+Type "systab -S"
+Sleep 500ms
+Enter
+Sleep 3s
+
+Sleep 2s

demo/quickstart.tape

@@ -0,0 +1,62 @@
+# systab — Quick Start
+# Creates a few jobs, checks status, views logs, then cleans up.
+
+Output demo/quickstart.gif
+Set Shell bash
+Set Width 1200
+Set Height 600
+Set FontSize 16
+
+Set TypingSpeed 50ms
+
+Sleep 1s
+
+# Create a recurring job
+Type "systab -t 'every 5 minutes' -c 'echo health check OK'"
+Sleep 500ms
+Enter
+Sleep 2s
+
+# Create a one-time job
+Type "systab -t 'in 30 minutes' -c 'echo reminder: meeting soon'"
+Sleep 500ms
+Enter
+Sleep 2s
+
+# Check status of all jobs
+Type "systab -S"
+Sleep 500ms
+Enter
+Sleep 4s
+
+# View logs
+Type "systab -L"
+Sleep 500ms
+Enter
+Sleep 3s
+
+# Pause a job (uses the first job ID from status)
+Type "systab -P $(systab -S 2>/dev/null | grep -m1 'Job:' | awk '{print $2}')"
+Sleep 500ms
+Enter
+Sleep 2s
+
+# Show it's paused
+Type "systab -S"
+Sleep 500ms
+Enter
+Sleep 3s
+
+# Resume it
+Type "systab -R $(systab -S 2>/dev/null | grep -m1 'Disabled' -B4 | grep 'Job:' | awk '{print $2}')"
+Sleep 500ms
+Enter
+Sleep 2s
+
+# Clean up completed one-time jobs
+Type "systab -C"
+Sleep 500ms
+Enter
+Sleep 2s
+
+Sleep 2s

systab

@@ -158,8 +158,11 @@ parse_time() {
     fi
 
     # Try to parse with date command (one-time specs)
+    # Strip "in " prefix for natural phrasing ("in 5 minutes" → "5 minutes")
+    local date_spec="$time_spec"
+    [[ "${date_spec,,}" == in\ * ]] && date_spec="${date_spec:3}"
     local parsed_date
-    if parsed_date=$(date -d "$time_spec" '+%Y-%m-%d %H:%M:%S' 2>/dev/null); then
+    if parsed_date=$(date -d "$date_spec" '+%Y-%m-%d %H:%M:%S' 2>/dev/null); then
         echo "$parsed_date"
         return
     fi