REVERTED feat(drive-integration): adding remove button redesign [INTEG-4135]

[Franco Banfi (FBanfi)]

Purpose

Adds a Remove action to the mapping review selection menu in the drive-integration app, with a confirmation modal before content is unmapped from entry fields.

Approach

• Selection menu redesign — EditMappingButton is now a split pill bar: "Edit content mapping" on the left, a divider, and a "Remove" action on the right (styles extracted to EditMappingButton.styles.ts via Emotion css).
• Remove confirmation modal — New RemoveContentModal asks "Are you sure you'd like to remove this content from the entry?" with Cancel / Remove actions.
• Remove flow in MappingView — Selecting mapped text shows Remove only when the selection overlaps mapped content. On confirm, the selected text/images are removed from every mapped field via existing applyTextExclusionToEntryBlockGraph / applyImageExclusionToEntryBlockGraph helpers.
• Multi-field edge case — If the same text is mapped to multiple fields on one entry (e.g. body and summary), removal clears it from all affected fields in one action.

Testing steps

Automated tests for the Remove modal and the Mapping view added.

Grabacion.de.pantalla.2026-06-11.a.la.s.3.44.46.p.m.mov

Breaking Changes

No.

Dependencies and/or References

INTEG-4135

Deployment

No.

[Franco Banfi (FBanfi)]

I reverted this PR after merging it because I merged it by mistake in the feature branch without a review. There is a new exact same PR here: #11023