[Bug] Univer getValue() returns null for rich text cells

[kikyujin]

Summary

Some cells return null from getValue() after save/reload.
The cell data is stored in Univer's rich text format ({ p: [{ v: "..." }] }) instead of plain string, causing the standard accessor to miss it.

Reproduction

1. Enter Japanese text in a cell
2. Save notebook (Ctrl+S)
3. Reload the page
4. getValue() returns null for that cell

Not all cells are affected — seems to depend on Univer's internal decision to store as rich text vs plain value.

Workaround

Added getCellValue helper that checks both v (plain) and p[0].v (rich text) paths.

• Commit: 0e14955 [B2026032201]

Root Cause

Likely a Univer-side behavior (not yet reported upstream).
To investigate: under what conditions does Univer choose rich text storage for plain text input.

Related

• Univer version: 0.18.0
• Phase 0 completed, discovered during Phase 1 prep