fix(Cell): restore clickable behavior when to or url prop is set

[haoku123]

Description

Fixes #13868: since v4.10.0, Cells that only set the to or url prop (without an explicit clickable) no longer route on click.

Root Cause

v4.10.0 (#13846, fix(Field): prevent click event when disabled with is-link) changed onClick to only bind when clickable is true, but the clickable computation only considered the clickable and isLink props. The implicit clickable behavior of to / url (working since before v4.10.0) was silently dropped.

Changes

• Cell.tsx: include to / url in the clickable computation:

  const clickable = Boolean(props.clickable ?? props.to ?? props.url ?? isLink)

• The ?? chain keeps the explicit opt-out: clickable={false} still disables interaction (existing test still passes).
• Added two regression tests for to-only and url-only cells.

Verification

• rstest run src/cell/test: 15/15 passed (2 new)
• rstest run src/field/test: 52/52 passed — confirms fix(Field): prevent click event when disabled with is-link #13846's disabled+is-link fix is not regressed

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.41%. Comparing base (ec5b45b) to head (c8d5e6e).
⚠️ Report is 282 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13894      +/-   ##
==========================================
- Coverage   89.60%   89.41%   -0.20%     
==========================================
  Files         257      257              
  Lines        7013     6698     -315     
  Branches     1736     1675      -61     
==========================================
- Hits         6284     5989     -295     
+ Misses        384      374      -10     
+ Partials      345      335      -10     

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