refactor: migrate isolated components from jQuery to DOM utilities

[KanishkKundu05]

Migrate isolated components away from jQuery to use native DOM APIs and utilities, as part of the ongoing effort to reduce jQuery dependencies across the codebase.

Changes

Replaced jQuery method calls with native DOM equivalents in 8 isolated components:

• elements/settings/account-settings-notice.ts
• elements/version-button.ts
• event-handlers/keymap.ts
• event-handlers/login.ts
• states/connection.ts
• test/funbox/memory-funbox-timer.ts
• test/out-of-focus.ts
• test/pb-crown.ts

Implementation Details

• Replaced jQuery selectors with getElementById(), querySelector(), querySelectorAll()
• Replaced .on() with addEventListener() and manual event delegation using .closest()
• Replaced jQuery utility methods with native equivalents

#7186

[github-actions]

Hey there and thank you for opening this pull request! 👋🏼

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Title "refactor: migrate isolated components from jQuery to DOM utilities"
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feat: add new feature (@github_username)
impr(quotes): add english quotes (@username)
fix(leaderboard): show user rank correctly (@user1, @user2, @user3)

[github-actions]

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[Leonabcd123]

You're supposed to use the utils in ts/utils/dom instead of the native selectors.

[fehmer]

Hi @KanishkKundu05 ,

thank you for your contribution. Like @Leonabcd123 already mentioned the goal of #7186 is to replace jQuery with our dom-utils. Please check the other PRs mentioned in the issue as reference.