[Desvelao]

Description

The About page heading read "Welcome to the Wazuh" followed by a description starting with "Dashboard provides…", and the page only showed the app version, so a user could not tell which build they run.

Closes #1698

Proposed Changes

• Changed the default opensearchDashboards.branding.applicationTitle to Wazuh dashboard, so the heading reads "Welcome to the Wazuh dashboard". A custom branding title still replaces it.
• Changed the About description to start with "It provides…", without repeating the title.
• Replaced "App version" with a single "App build" item, composed as <version>-<stage>-<revision> (e.g. 5.0.0-rc3-11), and centered it vertically with the Cluster UUID.
• Added the opensearchDashboards.branding.applicationRevision setting. When it or applicationVersion is defined (empty strings are valid), the build is only <applicationVersion><applicationRevision> concatenated with no separator: the built-in values are not used and an undefined setting contributes an empty string. An empty build is shown as -.
• Allowed empty strings for both settings in the legacy config schema.
• Side effect of the new title default: the browser tab title and the logo alt texts read "Wazuh dashboard" (rendering snapshots updated).

Results and Evidence

Artifacts Affected

• Dashboard platform (src/core branding config and rendering, src/plugins/about).

Configuration Changes

• New optional setting opensearchDashboards.branding.applicationRevision (documented in config/opensearch_dashboards.yml).
• The default of opensearchDashboards.branding.applicationTitle changes from Wazuh to Wazuh dashboard.

Documentation Updates

• CHANGELOG.md entries (Added, Fixed).

Tests Introduced

• format_build.test.ts: default and overridden compositions, empty strings included.
• app_info.test.tsx, general_info.test.tsx: the build item, the heading and the description.
• rendering_service.test.ts: applicationRevision is injected; updated the default title expectations and snapshots.

Review Checklist

How to Test

1. Start the dashboard and open About: the heading reads "Welcome to the Wazuh dashboard" and the build reads <version>-<stage>-<revision>.
2. Set opensearchDashboards.branding.applicationRevision: "-custom" and restart: the build reads -custom.
3. Also set opensearchDashboards.branding.applicationVersion: "5.0.0": the build reads 5.0.0-custom.
4. Set both to "": the build shows -.

• Code changes reviewed
• Relevant evidence provided
• Tests cover the new functionality
• Configuration changes documented
• Developer documentation reflects the changes
• Meets requirements and/or definition of done
• No unresolved dependencies with other issues
• PR is linked to the relevant issue(s)
• Correct labels applied (e.g., no-changelog)

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