Resolve all eslint errors and remove dead config files

[tejhan]

Description:

This PR fixes all 27 outstanding ESLint errors and removes dead configuration files.

Changes:

• Add **/*.mjs to eslint ignores
• Fix catch (e) -> catch for unused vars in fuzz tests
• Fix prefer-template violations
• Fix no-unused-expressions for chai assertions in fuzz tests
• Replace {} with Record<string, never>
• Delete .eslintrc.js and webview-ui/.eslintrc.cjs (replaed post ESLint 10 flat config migration)
• Fix webview-ui lint script to not reference deleted .eslintrc.cjs

npm run lint and npm run lint:all now both pass cleanly.

See PR #2210 for necessary changes in our workflow files & package.json.

• Enforce ESLint in CI pipeline #2210

[Copilot]

Pull request overview

This PR aims to complete the ESLint flat-config migration cleanup by eliminating remaining lint errors (notably in fuzz tests) and removing legacy .eslintrc* configuration files, while keeping lint scripts working across the root and webview-ui packages.

Changes:

• Updates ESLint invocation/ignores for the repo and webview-ui, and removes legacy .eslintrc* configs.
• Refactors fuzz tests to satisfy rules like no-unused-vars, prefer-template, and no-unused-expressions.
• Tightens “no-parameters” webview message definitions by replacing {} with Record<string, never>.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
webview-ui/package.json	Updates lint scripts to no longer reference removed legacy config.
webview-ui/.eslintrc.cjs	Removes legacy ESLint config (post flat-config migration).
src/webview-contract/webviewDefinitions/kaitoModels.ts	Uses Record<string, never> for “empty” message payload types.
src/webview-contract/webviewDefinitions/kaitoManage.ts	Uses Record<string, never> for “empty” message payload types.
src/tests/fuzz/tcpdump-parsing.fuzz.test.ts	Adjusts catch clauses and assertions to satisfy ESLint rules.
src/tests/fuzz/kaito-gpu-parsing.fuzz.test.ts	Adjusts catch clauses and assertions to satisfy ESLint rules.
src/tests/fuzz/azure-api-utils.fuzz.test.ts	Fixes prefer-template and unused catch binding.
eslint.config.mjs	Adds **/*.mjs to ignores.
.eslintrc.js	Removes legacy ESLint config (post flat-config migration).

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[Copilot]

Pull request overview

Copilot reviewed 9 out of 9 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

.eslintrc.js:1

• This PR deletes .eslintrc.js, but the root package.json still references it in lint:all / lint-fix:all (e.g. eslint -c .eslintrc.js ...). Unless PR #2210 is merged first (and this branch includes those script updates), npm run lint:all will fail, which contradicts the PR description that both lint scripts pass cleanly.