Validating support for Angular versions greater than 9

[Copilot]

• Investigate CI failure: TS2693: 'Component' only refers to a type, but is being used as a value here in test component files
• Root cause: tsconfig.build.json inherited include: ["src/**/*.ts", "test/**/*.ts"] from base tsconfig, causing test fixture components to be compiled during the build step with TypeScript 5.x + older Angular type declarations
• Fix: replaced exclude: ["test/**/*.spec.ts"] with include: ["src/**/*.ts"] in tsconfig.build.json so the build only compiles library source files
• Validate the fix passes CI for all Angular versions (13–21)

[Skitionek]

@copilot fix tests

[Skitionek]

@copilot try again

[Skitionek]

@anthropic-code-agent can you take over?

[Skitionek]

@openai-code-agent can you take over?

[Skitionek]

@copilot try again

[Skitionek]

@copilot try again

[Skitionek]

@copilot try again

[Skitionek]

@copilot Fix Error: test/components/dynamic-outlets.component.ts(7,2): error TS2693: 'Component' only refers to a type, but is being used as a value here.
Error: test/components/placeholder.component.ts(3,2): error TS2693: 'Component' only refers to a type, but is being used as a value here.
Error: Process completed with exit code 2.

[Copilot]

@copilot Fix Error: test/components/dynamic-outlets.component.ts(7,2): error TS2693: 'Component' only refers to a type, but is being used as a value here.
Error: test/components/placeholder.component....

Fixed in commit 3fdec14. The root cause was that tsconfig.build.json inherited include: ["src/**/*.ts", "test/**/*.ts"] from the base tsconfig, so test fixture components (which use @Component with TypeScript 5.x + older Angular type declarations) were compiled during the build step. Changed exclude: ["test/**/*.spec.ts"] to include: ["src/**/*.ts"] so the build only compiles library source files.