fix: not add empty css to chunk

[xusd320]

对于空的 css, 不生成 chunk

Summary by CodeRabbit

• Bug Fixes
  • Improved handling of empty rules in the ChunkPot implementation.

[coderabbitai]

Walkthrough

The overall change involves enhancing the ChunkPot implementation by conditionally pushing certain data only when ast.ast.rules is not empty.

Changes

File	Change Summary
crates/mako/src/chunk_pot.rs	Added a conditional check to limit pushing of data based on ast.ast.rules

Poem

In code we dance, with checks so fine,
ChunkPot now sings, a melody divine.
Only when rules do play their part,
Merged data flows, with a coder's heart.

Note

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Commits

Files that changed from the base of the PR and between ae069a8 and 1ea0bee.

Files selected for processing (1)

• crates/mako/src/chunk_pot.rs (1 hunks)

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