[BUG] i18n tag labels are corrupted by camelCase word-splitting in the OpenAPI compiler

[lucasvaccaro]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Relates to a fix done in @cap-js/ord plugin: cap-js/ord#532

Processing of OpenAPI tags disregards the idea of i18n placeholders.

When an entity has a camelCase i18n @label/@title, the OpenAPI compiler's normaliseTag() splits it into words before localization occurs. This corrupts the i18n key, causing the localization step to fail — the key no longer exists in .properties and the raw broken key is emitted as-is.

e.g.

1. Entity annotated with title as '{i18n>entity.TasksPlural}'
2. OpenAPI processes it and transforms it into {i18n>entity.Tasks Plural}
3. Localization is applied (e.g. see chore: Introduce localization for resource definitions ord#532)
4. Text is not replaced correctly

Expected Behavior

The resolved translation value should appear (e.g. Tasks).

Steps To Reproduce

1. Annotate a CDS entity with a camelCase i18n label:

   annotate MyService.Tasks @label: '{i18n>entity.TasksPlural}';

2. Add the key to i18n_en.properties:

   entity.TasksPlural=Tasks
   

3. Compile to OpenAPI (e.g. cds compile --to openapi)

4. Observe the generated tag name is entity.Tasks Plural

Environment

| Package                 | Version | Location                                                   |
 | ----------------------- | ------- | ---------------------------------------------------------- |
 | @sap/cds-dk             | 9.9.1   | ./node_modules/@sap/cds-dk                                 |
 | @sap/cds                | 9.9.1   | ./node_modules/@sap/cds                                    |
 | @sap/cds                | 9.9.1   | ./node_modules/@sap/cds-dk/node_modules/@sap/cds           |
 | @sap/cds-compiler       | 6.6.2   | ./node_modules/@sap/cds-compiler                           |
 | @sap/cds-compiler       | 6.9.1   | ./node_modules/@sap/cds-dk/node_modules/@sap/cds-compiler  |
 | @sap/cds-fiori          | 2.1.1   | ./node_modules/@sap/cds-fiori                              |
 | @sap/cds-fiori          | 2.3.0   | ./node_modules/@sap/cds-dk/node_modules/@sap/cds-fiori     |
 | @sap/cds-mtxs           | 3.9.7   | ./node_modules/@sap/cds-mtxs                               |
 | @sap/cds-mtxs           | 3.9.0   | ./node_modules/@sap/cds-dk/node_modules/@sap/cds-mtxs      |
 | @cap-js/asyncapi        | 1.1.0   | ./node_modules/@cap-js/asyncapi                            |
 | @cap-js/asyncapi        | 1.0.3   | ./node_modules/@sap/cds-dk/node_modules/@cap-js/asyncapi   |
 | @cap-js/attachments     | 3.6.1   | ./node_modules/@cap-js/attachments                         |
 | @cap-js/cds-test        | 1.0.1   | ./node_modules/@cap-js/cds-test                            |
 | @cap-js/cds-types       | 0.15.0  | ./node_modules/@cap-js/cds-types                           |
 | @cap-js/change-tracking | 1.1.4   | ./node_modules/@cap-js/change-tracking                     |
 | @cap-js/db-service      | 2.8.1   | ./node_modules/@cap-js/db-service                          |
 | @cap-js/db-service      | 2.11.0  | ./node_modules/@sap/cds-dk/node_modules/@cap-js/db-service |
 | @cap-js/hana            | 2.5.1   | ./node_modules/@cap-js/hana                                |
 | @cap-js/openapi         | 1.6.0   | ./node_modules/@cap-js/openapi                             |
 | @cap-js/openapi         | 1.4.0   | ./node_modules/@sap/cds-dk/node_modules/@cap-js/openapi    |
 | @cap-js/ord             | 1.9.2   | ./node_modules/@cap-js/ord                                 |
 | @cap-js/sqlite          | 2.1.2   | ./node_modules/@cap-js/sqlite                              |
 | @cap-js/sqlite          | 2.4.0   | ./node_modules/@sap/cds-dk/node_modules/@cap-js/sqlite     |
 | @cap-js/telemetry       | 2.0.1   | ./node_modules/@cap-js/telemetry                           |
 | cds.home                |         | ./node_modules/@sap/cds                                    |
 | npm root -l             |         | ./node_modules                                             |
 | npm root -g             |         | ~/.nvm/versions/node/v22.23.1/lib/node_modules             |
 | Node.js                 | 22.23.1 | ~/.nvm/versions/node/v22.23.1/bin/node                     |

Repository Containing a Minimal Reproducible Example

Internal.

Anything else?

No response