Add strict type checking

```
"forceConsistentCasingInFileNames": true,
"strict": true,
"noImplicitOverride": true,
"noPropertyAccessFromIndexSignature": true,
"noImplicitReturns": true,
"noFallthroughCasesInSwitch": true,
```

```
"angularCompilerOptions": {
"enableI18nLegacyMessageIdFormat": false,
"strictInjectionParameters": true,
"strictInputAccessModifiers": true,
"strictTemplates": true
}
```

Start by locating the project's TypeScript configuration and the angularCompilerOptions block shown in the issue, then run the existing type-check or build command to identify current errors. Enable the listed strict options and resolve the resulting errors until the project type-checks and builds successfully.

Written by the indexing model from the issue text.