[Epic] Rewrite

[arildm]

AngularJS is end-of-life since 2022 and Vue is considered the best alternative, see discussion in #228.

The plan is:

1. Prepare for migration
   • Use more Vue-compatible concepts
   • Remove horizontal dependencies
   • Clean up and document code
2. Migrate incrementally
3. Improve maintainability
   • Add tests

Ideally, tests would be added first, to easily verify further changes. But testing is currently meager and difficult, and would have to be rewritten after migration.

Subtasks:

• Rewrite: Remove globals #369
• Rewrite: Clean up dependencies #370
• Rewrite: Convert directives to components #371
• Rewrite: Add more TypeScript #372
• Rewrite: Migrate to Vue #373

[arildm]

This is roughly how I think the order of things should be. The arrows mark prerequisites, but they aren't all strict. For instance, TS is not necessary for anything, but it is helpful for most subsequent steps.

flowchart TD
	%% General prerequisites
	%% TS --> Simplify --> RemoveDeps --> Vue

	%% Specific prerequisites
	TS --> Simplify
	RemoveDirectives --> Vue
	Axios --> jQuery
	jQuery --> Vue
        Vite --> Tests

	subgraph Simplify
		RemoveDirectives
		ErrorHandling --> Axios --> KorpClient
	end

	subgraph RemoveDeps
		Rickshaw
		Smoothness --> jQuery
		Moment
		Brat
		BootstrapJs --> jQuery
		BootstrapJs --> Bootstrap
		BootstrapCss --> Bootstrap
	end

	subgraph Vue
		Components --> Vite
		Vite --> Pinia
	end

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