Add theme capability summaries to Console

[ruibaby]

What type of PR is this?

• Feature
• Bug fix
• Improvement
• Cleanup
• Documentation

What this PR does / why we need it:

Add capability summaries to the Console theme detail page:

• List the system, custom, layout, and other templates provided by the theme, excluding static assets.
• Show page layout contract support and diagnostics.
• Show UI loading status and registered Console/User Center capabilities.
• Provide dialogs for detailed template and UI capability information.

A new theme capabilities endpoint supplies template information and route patterns resolved from the current site configuration. Template descriptions and routes use a single frontend lookup, and route patterns are displayed as plain text. Existing settings tabs remain the entry point for theme settings.

Which issue(s) this PR fixes:

Refs #10044

This draft covers themes only; plugin detail improvements remain out of scope.

Special notes for your reviewer:

Implemented with LLM assistance: Codex for the backend and Claude Code for the frontend. Full review is pending.

Validation:

• Focused backend tests passed for theme capabilities, UI bundles, endpoint routing, and WebFlux configuration.
• Latest validation: focused backend capability and endpoint tests passed; Claude Code reported 43 frontend tests, typecheck, lint, format checks, and browser checks passing against the updated endpoint.
• The loaded-theme UI declaration path still needs browser verification.
• Source diff whitespace checks passed, excluding generated API client files.

Does this PR introduce a user-facing change?

主题详情页支持查看系统与自定义模板、页面布局支持情况及 UI 扩展能力。

[pkg-pr-new]

Open in StackBlitz

@halo-dev/api-client

npm i https://pkg.pr.new/@halo-dev/api-client@10297

@halo-dev/components

npm i https://pkg.pr.new/@halo-dev/components@10297

@halo-dev/richtext-editor

npm i https://pkg.pr.new/@halo-dev/richtext-editor@10297

@halo-dev/ui-shared

npm i https://pkg.pr.new/@halo-dev/ui-shared@10297

@halo-dev/ui-plugin-bundler-kit

npm i https://pkg.pr.new/@halo-dev/ui-plugin-bundler-kit@10297

commit: 71d0596

[sonarqubecloud]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud