[04/44] Enable TS strict mode in dot-layout-grid

[nicobytes]

Description

Part of the strict-mode rollout epic #35932. Enable TypeScript strict mode for the dot-layout-grid project using typescript-strict-plugin.

• Dependency layer: 0 (0 = leaf library, 10 = top-level app)
• Internal dependents: 0 project(s)
• Rollout order: 4 / 44
• Note: Isolated (0 dependents) - can be done in parallel anytime.

All internal dependencies of dot-layout-grid should already be in strict mode before starting (they appear earlier in the rollout order).

Acceptance Criteria

• dot-layout-grid's src is added to the typescript-strict-plugin strict paths config.
• All resulting type errors are resolved (no new any; use explicit types).
• // @ts-strict-ignore is used only where unavoidable, each with a follow-up TODO.
• yarn nx run dot-layout-grid:lint passes (and :build / :test where applicable).
• npx tsc-strict passes for dot-layout-grid.
• yarn nx affected -t build does not break dependents.

Priority

Medium

Additional Context

One project in the bottom-up rollout tracked by epic #35932. Depends on the bootstrap task being merged and on lower-layer projects already being strict.

[nicobytes]

Closing as not applicable — dot-layout-grid is dead code. Removal is tracked in #36950 (which now covers both this library and libs/dotcms).

Unlike the earlier projects in this rollout, strict genuinely is not enabled here — libs/dot-layout-grid/tsconfig.json has none of the flags, and turning them on produces 119 errors across 2905 lines. It is not worth fixing.

Nobody imports it (verified four ways):

Check	Result
Nx project graph	0 dependents, 0 outgoing dependencies
@dotcms/dot-layout-grid alias usage	Only its own definition at tsconfig.base.json:33
Exported symbols (NgGridModule, NgGrid, NgGridItem, NgGridConfig, …) in .ts	None outside the library
Template usage (nggrid, ng-grid) in .html	None

The symbol and template searches matter here — this is a library of Angular directives, consumed from templates, so the path alias alone would not prove it.

Dead for two years, and broken:

• Its last consumer was deleted in 5e75d4ddb0 (2024-08-22, "remove unused code from old template builder"). It was superseded by GridStack 8.4.0 in libs/template-builder.
• It does not compile — src/lib/directives/NgGrid.ts:8 imports ComponentFactoryResolver, which was removed from Angular (deprecated v13, dropped v20+). That is 2 errors before strict is even involved.
• peerDependencies still pin Angular ^6.0.0 || ^7.2.0; the workspace is on Angular 21+.
• It has no build target at all and is tagged ["skip:test", "skip:lint"] — nothing in CI compiles it, so enabling strict here would change no CI outcome whatsoever.
• Never published to npm, so there are no external consumers either.

Epic #35932 goes from 44 to 42 projects (this and #35936).