Fix grid material error

[cptbtptpbcptdtptp]

galacean/engine#2807
1.6 这个 PR 更新了 common.glsl ，导致 camera_ProjectionParams 声明多次

Summary by CodeRabbit

• Refactor
  • Updated grid rendering shader internals to streamline parameters and improve consistency.
  • No user-facing behavior changes are expected; grid visuals and performance should remain the same.

[coderabbitai]

Walkthrough

Removed the uniform declaration camera_ProjectionParams from the grid vertex shader in GridMaterial.ts, while the shader code still references camera_ProjectionParams.x. No other files or logic were changed.

Changes

Cohort / File(s)	Summary of Changes
Grid shader uniform removal packages/custom-material/src/grid/GridMaterial.ts	Deleted vertex-shader uniform declaration uniform vec4 camera_ProjectionParams; while retaining references to camera_ProjectionParams.x in the shader code.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

A nibble of code, a uniform gone,
I twitch my whiskers, hop along.
Shader stars blink—“where’s x?” they plea—
I thump: “Re-add or set it free!”
Under moonlit diffs I lightly tread,
Fix the link, then off to bed. 🐇✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title "Fix grid material error" succinctly and accurately reflects the primary intent of the changeset, which addresses a shader-related bug in packages/custom-material/src/grid/GridMaterial.ts (the removed uniform leads to a compilation/runtime error). It is short, focused on the main problem, and clearly signals a bug fix to reviewers. The phrasing is specific enough for a teammate scanning history to understand the PR's purpose without extraneous detail.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

• 📝 Generate Docstrings

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 571ac66 and a161691.

📒 Files selected for processing (1)

• packages/custom-material/src/grid/GridMaterial.ts (0 hunks)

💤 Files with no reviewable changes (1)

• packages/custom-material/src/grid/GridMaterial.ts

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