add text description when clicking on image in reader

[arthur-lemeur]

Fixes ##3139

[gautierchomel]

Great!
To be discussed:

• "altText": "Alternative text" not being used, it can be commented.
• Instead, the Summary of the detail element is filled with the content of the alt argument. That's great as alt would be very hard to explain in an human understandable way. But we should remember that no limit exist on the lenght of alt
• Also, the Summary should also describe the action that it triggers.
• If no alt or empty alt, then a generic "about": "About this image" is used. Correctly authored epub should never have content here, so in case of empty alt we would probably end up with a "About this image" that will contain nothing.

Because of that I suggest to use a generic descriptive label (Expand or collapse textual descriptions). for the Summary and place (if it exists) the alt as the first p under.

[danielweck]

could you please undo your changes to package-lock.json?

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	electron-builder@​26.4.0
	@​typescript-eslint/​parser@​8.54.0 ⏵ 8.53.0
	@​typescript/​native-preview@​7.0.0-dev.20260202.1 ⏵ 7.0.0-dev.20260114.1
	@​babel/​generator@​7.29.0 ⏵ 7.28.6	+1		+1
	@​typescript-eslint/​eslint-plugin@​8.54.0 ⏵ 8.53.0	+1
	@​types/​node@​22.19.7 ⏵ 22.19.6
	@​electron/​rebuild@​4.0.3 ⏵ 4.0.2				-2
	css-loader@​7.1.3 ⏵ 7.1.2	+1
	electron@​39.2.7

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[gautierchomel]

Apologises for mis manipulation ending with commit and revert commit being pushed here.