feat(Chart): add ShowTotalDataLabel parameter

[ArgoZhang]

Link issues

fixes #8192

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Add a new bar chart demo showcasing stacked total data labels.

New Features:

• Introduce a bar chart sample that displays total data labels for stacked datasets.

Enhancements:

• Extend chart configuration options to support showing total data labels in stacked bar charts.

Documentation:

• Update localized demo text for the new stacked total data label bar chart example.

[sourcery-ai]

Reviewer's Guide

Adds support and a demo for showing total data labels on stacked bar charts, including a new chart initialization method, a corresponding demo block, and localized text entries.

Sequence diagram for stacked bar chart total data label demo

sequenceDiagram
    actor User
    participant BarPage
    participant Chart
    participant BarCodeBehind
    participant ChartDataSource

    User->>BarPage: Navigate to BarTotalDataLabel demo
    BarPage->>Chart: Render Chart ChartType.Bar OnInitAsync=OnInitTotalDataLabel
    Chart->>BarCodeBehind: OnInitTotalDataLabel()
    BarCodeBehind->>ChartDataSource: create ChartDataSource
    BarCodeBehind->>ChartDataSource: set Options.ShowDataLabel = true
    BarCodeBehind->>ChartDataSource: set Options.ShowTotalDataLabel = true
    BarCodeBehind-->>Chart: return ChartDataSource
    Chart-->>User: Display stacked bar chart with total data labels

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File-Level Changes

Change	Details	Files
Add a new stacked bar chart configuration that enables both individual and total data labels.	Introduce OnInitTotalDataLabel method that constructs a ChartDataSource for a stacked bar chart. Configure chart options to show data labels, show total data labels, center the labels, and stack both X and Y axes. Populate labels and datasets to demonstrate totals across multiple series.	src/BootstrapBlazor.Server/Components/Samples/Charts/Bar.razor.cs
Expose the new total data label chart configuration in the bar chart demo page.	Add a new DemoBlock for the total data label example wired to OnInitTotalDataLabel. Reference localized title and introduction strings for the new demo block.	src/BootstrapBlazor.Server/Components/Samples/Charts/Bar.razor
Provide localization and any supporting project configuration for the new bar chart total data label demo.	Add or update en-US localization entries for the new bar chart total data label title and introduction. Add or update zh-CN localization entries for the new bar chart total data label title and introduction. Adjust project configuration if needed to include or update localization resources.	src/BootstrapBlazor.Server/BootstrapBlazor.Server.csproj src/BootstrapBlazor.Server/Locales/en-US.json src/BootstrapBlazor.Server/Locales/zh-CN.json

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#8192	Add a boolean parameter to stacked bar charts (e.g., ShowTotalDataLabel) that, when enabled, displays the total value above each stacked bar.	✅
#8192	Expose and demonstrate the new total-above-bar option in the bar chart samples and related localization/docs so users can see and use the feature.	✅

Possibly linked issues

• feat(Bar Chart): Show the total number above each bar in a stacked bar chart #8192: PR implements ShowTotalDataLabel for stacked bar charts, directly fulfilling the requested total-above-bar feature.

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[bb-auto]

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[sourcery-ai]

Hey - I've left some high level feedback:

• The new OnInitTotalDataLabel setup largely duplicates the stacked bar configuration; consider extracting a shared helper for common stacked options to keep these demos easier to maintain.
• The chart title "Stacked total" in OnInitTotalDataLabel is hard-coded while other text is localized; consider aligning this with the localization approach used elsewhere in the Bar chart samples.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The new `OnInitTotalDataLabel` setup largely duplicates the stacked bar configuration; consider extracting a shared helper for common stacked options to keep these demos easier to maintain.
- The chart title "Stacked total" in `OnInitTotalDataLabel` is hard-coded while other text is localized; consider aligning this with the localization approach used elsewhere in the Bar chart samples.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (1557d5d) to head (5af6049).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #8216   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          769       769           
  Lines        34427     34427           
=========================================
  Hits         34427     34427           

Flag	Coverage Δ
BB	100.00% <ø> (?)

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