[S-02] Professor can create a post-meeting note and revisit one student's history

[ounold]

Summary

Allow the professor to open one student, create a dated post-meeting note with short bullet items, and later reopen that same student thread to see the note in chronological context.

Type

Slice

Status at import

ready

Why this matters

This is the smallest complete validation milestone for the product promise. It validates continuity, not just storage.

Depends on

• F-01
• F-02

Blocks / Unlocks

• Unlocks: S-03, S-04, S-05

PRD references

• US-01
• US-05
• FR-001
• FR-002
• FR-004
• FR-008

Definition of done

• A note belongs to exactly one student
• A note supports brief bullet-point content
• Notes appear in chronological order for that student
• The professor can understand current state by revisiting that thread later

Notes

• Imported from context/foundation/roadmap.md