fix(build): fix themeSaas build errors, add LESS compilation and error handling, update gulp tasks to enhance readability and debug information

[zzcr]

fix(build): 修复themeSaas构建报错，添加LESS编译和错误处理，更新gulp任务以增强可读性和调试信息

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our Commit Message Guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

Summary by CodeRabbit

• Chores
  • Updated LESS dependency and pinned version for consistent builds.
  • Enhanced build pipeline with detailed logging and robust error handling to improve reliability and troubleshooting.
  • Added optional development sync flow to mirror compiled assets into a linked project during development.
  • Introduced a development task with watch support for faster iteration.
  • Improved copy steps (CSS variables, SVGs, images, plugins, theme) to support the new sync flow and provide clearer completion feedback.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Adds Less 4.3.0 as a dependency and pins it via pnpm overrides. Overhauls the Gulp build in packages/theme-saas to add detailed logging, robust per-stage error handling, async task completion via done callbacks, an optional dev sync to a TinyVue project, and a new dev task.

Changes

Cohort / File(s)	Summary of changes
Dependency pinning package.json	Added runtime dependency less@4.3.0; added pnpm.overrides entry to pin less@4.3.0.
Build pipeline & tasks packages/theme-saas/build/gulp-dist.js	Introduced detailed logging and per-stage error handlers across the LESS/CSS pipeline; refactored tasks to async style using done(); added optional sync-to-devDist for TinyVue; updated copy tasks to honor sync; added new dev task; updated compile, copycssvar, copysvgs, copyimage, copyplugin, copyTheme task wrappers to report errors/end.

Sequence Diagram(s)

sequenceDiagram
  autonumber
  participant Dev as Developer
  participant Gulp as Gulp CLI
  participant Build as Compile Pipeline
  participant Dist as dist/
  participant DevDist as devDist/ (TinyVue)
  participant Copy as Copy Tasks

  Dev->>Gulp: run "gulp compile" or "gulp dev"
  activate Gulp

  rect rgba(230,240,255,0.5)
    note right of Build: Enhanced logging + per-stage error handling
    Gulp->>Build: start compile
    Build->>Build: Read sources
    Build->>Build: Inline SVG (phase 1)
    Build->>Build: LESS compile
    Build->>Build: PostCSS + Autoprefixer
    Build->>Build: Inline SVG (phase 2)
    Build->>Build: Minify CSS
    Build-->>Dist: Write outputs
    alt syncToTinyVueProject enabled
      Build-->>DevDist: Write dev outputs (sync)
    end
  end

  rect rgba(240,255,240,0.5)
    note right of Copy: Copy css vars, svgs, images, plugins, theme
    Gulp->>Copy: run copy tasks
    Copy-->>Dist: Copy assets
    alt sync enabled
      Copy-->>DevDist: Copy assets (sync)
    end
  end

  Gulp-->>Dev: logs completion or errors
  deactivate Gulp

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Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Poem

I nibble on CSS like clover at dawn,
Less sprouts to 4.3—fresh leaves on the lawn.
Gulp drums a rhythm: log, catch, and compile,
Sync hops to TinyVue—mile after mile.
With whiskers a-twitch and pipelines that sing,
I ship tidy bundles—thump goes the spring! 🐇✨

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📥 Commits

Reviewing files that changed from the base of the PR and between 5e06144 and f1be50f.

📒 Files selected for processing (2)

• package.json (1 hunks)
• packages/theme-saas/build/gulp-dist.js (6 hunks)

✨ Finishing Touches

• 📝 Generate Docstrings

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch zzc/fix-theme-saas-build-error-0905

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