[BUG FIX] [MER-5887] Learning Objectives Authoring Elements Corrections

[gastonabella]

Summary

This PR completes the authoring-side corrections for the Learning Objectives Introduction/Summary feature originally introduced in #6745.

It focuses on the authoring requirements from:

• MER-5802: authoring insert menu support for the Learning Objectives element
• MER-5803: authoring support for Learning Objective Introduction
• MER-5804: authoring support for Learning Objective Summary

Changes

• Updated the Insert menu Objectives entry to match the intended icon, placement, hover/focus behavior, and root-only insertion behavior.
• Refined the authoring layout for Learning Objective Introduction and Summary, including descriptions, mode selector placement, panel structure, spacing, warning placement, and proficiency accordion.
• Updated LO cards to match the expected authoring structure, including LO X labels, parent/sub-objective grouping, recommendation selectors, chips, disabled add actions, and tooltip behavior.
• Added non-destructive remove/restore behavior for objectives, preserving recommendation config while toggling enabled.
• Improved the empty-LO warning banner, including warning icon, dismiss action, colors, and no-false-warning behavior while LOs are unresolved.
• Added the shared trash icon treatment for authoring delete buttons and LO remove actions.
• Added authoring dark mode color fixes for LO surfaces, cards, warnings, chips, controls, and proficiency blocks.
• Added focused Jest coverage for insert behavior, mode switching, hierarchy rendering, remove/restore preservation, recommendation actions, empty warning behavior, and unresolved LO state.

Notes

The student/delivery corrections from MER-5867 are intentionally left for a follow-up PR covering MER-5807 and MER-5808.

Screen.Recording.2026-08-21.at.3.56.24.PM.mov

[github-actions]

	Warnings
⚠️	PR is large (2526 LOC changed). Consider splitting.

Risk score: 16 → risk/high

Generated by 🚫 dangerJS against 48065ce

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