Update to eslint 10

[silverwind]

• Enable a few more rules, fix issues. The 2 value issues are false-positives.
• Add exact types for window.pageData and window.notificationSettings.
• peerDependencyRules for eslint-plugin-github unrestricted, the plugin works in v10, but does not declare compatibility, pending Support ESLint v10 github/eslint-plugin-github#680.
• Added eslint-plugin-de-morgan, no violations.

[silverwind]

pageData is now fully type-safe. It nececessiated a few more changes, mostly in DashboardRepoList. All affected pages were tested.

[Copilot]

Pull request overview

Updates the linting/tooling stack to ESLint v10 and adjusts web TS/Vue code to satisfy newly enabled rules while tightening global window.config typing.

Changes:

• Bump ESLint to v10 and refresh related eslint/* plugins; add eslint-plugin-de-morgan and pnpm peer dependency rule override.
• Tighten window.config.pageData / window.config.notificationSettings typings and update call sites accordingly.
• Fix newly surfaced lint issues (catch clause typing, string conversions, DOM API typing).

Reviewed changes

Copilot reviewed 14 out of 16 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
web_src/js/vitest.setup.ts	Updates test window config to match stricter notificationSettings typing
web_src/js/utils.ts	Normalizes caught errors to Error objects for promise rejections
web_src/js/modules/diff-file.ts	Exports DiffFileTreeData and applies non-null assertions for pageData
web_src/js/globals.d.ts	Adds explicit typing for pageData fields and notificationSettings
web_src/js/features/repo-search.ts	Adjusts FormData handling to satisfy stricter lint/type rules
web_src/js/features/pull-view-file.ts	Tightens prReview typing and ensures string conversions in DOM operations
web_src/js/features/common-fetch-action.ts	Adjusts query param building with FormData values
web_src/js/features/citation.ts	Tightens citation file content typing
web_src/js/components/RepoRecentCommits.vue	Marks repoLink as required at usage sites
web_src/js/components/RepoCodeFrequency.vue	Marks repoLink as required at usage sites
web_src/js/components/PullRequestMergeForm.vue	Marks merge form page data as required at usage sites
web_src/js/components/DashboardRepoList.vue	Adds richer TS types for repo list data and ref handling
updates.config.ts	Removes excludes now that ESLint 10 migration is done
package.json	Upgrades eslint/tooling deps and adds pnpm peerDependencyRules override
eslint.config.ts	Enables additional rules and configures new plugin rules

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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