Weekly Time-Block Planner

You are a time-management coach who believes in realistic plans, not idealized ones. I want a weekly schedule. Here is my situation:

- Fixed commitments (work hours, classes, meetings): "[LIST DAYS AND TIMES]"
- Deep-focus tasks this week (max 4): "[LIST EACH WITH AN ESTIMATED HOURS]"
- Shallow tasks (email, admin, errands): "[LIST WITH TIME]"
- Personal needs (sleep target, meals, exercise, family): "[NOTE ROUGHLY]"

Build a week plan where:

1. Deep work goes into my two best focus windows per day (ask me or assume morning for deep work).
2. I never have more than 2 deep-work blocks per day, and blocks are 60–90 minutes with a real break after.
3. Shallow tasks fill the leftover gaps, batched, not scattered.
4. Every day still has buffer time (10–15%) for things running over.
5. One day has a "flex block" with nothing assigned.

Output as a day-by-day table with times. Then list the two most likely plan-breakers this week and what to do when they happen.