Phase 3.2 (task 2): refactor(DependencyGraph): convert class component to functional

[Parship12]

Which problem is this PR solving?

• Resolves [UI Refactor] Migrate DependencyGraph to Functional Component #3380
• Part of [🧑‍🎓 LFX]: Upgrading Core Routing and State Management #3313

Description of the changes

• Convert DependencyGraph/index.tsx from class component to a functional component.
• withRouteProps is never used in this component, so it's safely removed.

How was this change tested?

• Unit tests
• Verified that the component works properly in the ui

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/main/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully: make lint test

AI Usage in this PR (choose one)

See AI Usage Policy.

• None: No AI tools were used in creating this PR
• Light: AI provided minor assistance (formatting, simple suggestions)
• Moderate: AI helped with code generation or debugging specific parts - helped rewriting the unit tests
• Heavy: AI generated most or all of the code changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.15%. Comparing base (0809a3b) to head (2ec71c9).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3591      +/-   ##
==========================================
+ Coverage   89.13%   89.15%   +0.01%     
==========================================
  Files         304      304              
  Lines        9712     9727      +15     
  Branches     2563     2506      -57     
==========================================
+ Hits         8657     8672      +15     
  Misses       1051     1051              
  Partials        4        4              

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[Copilot]

Pull request overview

Refactors the Jaeger UI DependencyGraph page from a React class component to a hook-based functional component, updating associated unit tests to align with functional-component patterns.

Changes:

• Converted DependencyGraphPageImpl from a class component to a functional component using useState, useEffect, and useRef.
• Removed withRouteProps wrapping from the default export and kept the Redux connect(...) wrapper.
• Refactored DependencyGraph unit tests to stop relying on component instances/state and instead assert behavior via mocked child props.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
packages/jaeger-ui/src/components/DependencyGraph/index.tsx	Migrates component logic to hooks, adjusts lifecycle behavior, and simplifies export to connect(...).
packages/jaeger-ui/src/components/DependencyGraph/index.test.js	Updates tests for functional component patterns by asserting through mocked DAG / DAGOptions props.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

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[Parship12]

@yurishkuro ptal