feat: use custom app title

[Raubzeug]

closes ##2561

CI Results

Test Status: ⚠️ FLAKY

📊 Full Report

Total	Passed	Failed	Flaky	Skipped
354	349	0	3	2

Test Changes Summary ⏭️2

⏭️ Skipped Tests (2)

1. Scroll to row, get shareable link, navigate to URL and verify row is scrolled into view (tenant/diagnostics/tabs/queries.test.ts)
2. Copy result button copies to clipboard (tenant/queryEditor/queryEditor.test.ts)

Bundle Size: ✅

Current: 85.19 MB | Main: 85.18 MB
Diff: +3.55 KB (0.00%)

✅ Bundle size unchanged.

ℹ️ CI Information

• Test recordings for failed tests are available in the full report.
• Bundle size is measured for the entire 'dist' directory.
• 📊 indicates links to detailed reports.
• 🔺 indicates increase, 🔽 decrease, and ✅ no change in bundle size.

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Pull Request Overview

This pull request implements custom app title functionality by introducing a context-based system to replace the hardcoded "YDB Monitoring" title throughout the application. The changes allow users to configure a custom application title that will be displayed in browser tabs and page headers.

• Introduces AppTitleContext for centralized title management
• Updates all page components to use the custom app title instead of hardcoded "YDB Monitoring"
• Refactors App component to support appTitle prop and remove Redux dependency for singleClusterMode

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/containers/App/AppTitleContext.tsx	New context provider for managing custom app title
src/containers/App/App.tsx	Refactored to support appTitle prop and use hooks instead of Redux connect
src/containers/App/Providers.tsx	Updated to include AppTitleProvider in component tree
src/containers/AppWithClusters/AppWithClusters.tsx	Added appTitle prop forwarding
src/containers/Cluster/Cluster.tsx	Updated to use custom app title in Helmet
src/containers/Node/Node.tsx	Updated to use custom app title in Helmet
src/containers/PDiskPage/PDiskPage.tsx	Updated to use custom app title in Helmet
src/containers/StorageGroupPage/StorageGroupPage.tsx	Updated to use custom app title in Helmet
src/containers/Tenant/Tenant.tsx	Updated to use custom app title in Helmet
src/containers/VDiskPage/VDiskPage.tsx	Updated to use custom app title in Helmet