chore(wren-ai-service): improve chart generation

[cyyeh]

add multi-line chart

Summary by CodeRabbit

• New Features

  • Added support for multi-line chart type across chart generation and adjustment services
  • Enhanced chart generation instructions to include multi-line chart requirements

• Improvements

  • Refined system prompts for chart generation and adjustment
  • Tightened reasoning requirements in chart generation prompts
  • Updated input context for data analyst visualization

• Technical Updates

  • Expanded chart type options in multiple service classes
  • Updated type definitions to include "multi_line" chart type

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📥 Commits

Reviewing files that changed from the base of the PR and between 019e8a49db53ad821e6f54fcc78c9922bd237935 and 849a6c8214aecaf7e6bf01e649b7d24e1dc10e1d.

📒 Files selected for processing (3)

• wren-ai-service/src/pipelines/generation/utils/chart.py (6 hunks)
• wren-ai-service/src/web/v1/services/chart.py (1 hunks)
• wren-ai-service/src/web/v1/services/chart_adjustment.py (2 hunks)

Walkthrough

The pull request introduces a new chart type called "multi_line" across multiple files in the Wren AI service. This change involves updating system prompts, chart generation instructions, and type definitions to support multi-line charts. The modifications primarily focus on expanding the chart type options in various components of the chart generation and adjustment systems, ensuring consistent support for the new chart visualization type.

Changes

File	Change Summary
src/pipelines/generation/chart_adjustment.py	Updated system prompt to broaden input context and add multi-line chart type
src/pipelines/generation/chart_generation.py	Modified system prompt and expanded chart type options
src/pipelines/generation/utils/chart.py	Added "Multi line chart" instructions and updated ChartGenerationResults type
src/web/v1/services/chart.py	Updated ChartResult to include "multi_line" chart type
src/web/v1/services/chart_adjustment.py	Added "multi_line" to ChartAdjustmentOption and ChartAdjustmentResult

Sequence Diagram

sequenceDiagram
    participant User
    participant ChartGeneration
    participant DataAnalyst
    participant ChartAdjustment

    User->>ChartGeneration: Request chart with data
    ChartGeneration->>DataAnalyst: Generate chart schema
    DataAnalyst-->>ChartGeneration: Return multi-line chart schema
    ChartGeneration->>ChartAdjustment: Propose chart adjustment
    ChartAdjustment->>DataAnalyst: Refine chart if needed
    DataAnalyst-->>ChartAdjustment: Return adjusted multi-line chart
    ChartAdjustment->>User: Present final chart

Possibly related PRs

• #1079: Enhances chart generation functionality by adding chart_type field.
• #1080: Ensures correct display of chart properties in the UI.

Suggested labels

module/ui

Suggested reviewers

• paopa

Poem

🐰 A rabbit's chart adventure begins anew,
Multi-lines dancing, data's vibrant hue!
From single threads to complex weave,
Our visualization now can achieve
A story told in graphical delight! 📊

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[cyyeh]

There are still some parts missing according to the Ai code review, I will add them later so I make the PR as draft

[cyyeh]

LGTM! leave a question comment only.

if chart is invalid, the chart type is empty string

[paopa]

LGTM! leave a question comment only.

if chart is invalid, the chart type is empty string

can you mention the thing in codebase, i think it will good for members to know, thanks!