fix(Teacher Tools): Fix broken images

[hirokiterashima]

Changes in Teacher Tools

• Images in prompt for any activity don't appear
• Match images in buckets and choices don't appear

Test

• Above is fixed

Closes #2250
Closes #2285

[qltysh]

Coverage Impact

Unable to calculate total coverage change because base branch coverage was not found.

Modified Files with Diff Coverage (1)

Rating	File	% Diff	Uncovered Line #s
	...splay/match-summary-display/match-summary-display.component.ts	100.0%
	Total	100.0%

🚦 See full report on Qlty Cloud »

🛟 Help

• Diff Coverage: Coverage for added or modified lines of code (excludes deleted files). Learn more.

• Total Coverage: Coverage for the whole repository, calculated as the sum of all File Coverage. Learn more.

• File Coverage: Covered Lines divided by Covered Lines plus Missed Lines. (Excludes non-executable lines including blank lines and comments.)

  • Indirect Changes: Changes to File Coverage for files that were not modified in this PR. Learn more.