feat: Enhance search

[CrawlerCode]

This pull request introduces major improvements to the issue search experience.

Previously, searching was somewhat confusing. There was a local search and "extended search" to find issues that are not assigned to you. Both searches were processed at the same time.

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Now you have to select a search mode:

Local search

You could search through all the issues on your list. This includes issues that you have pinned, remembered, or where timers still exist. However, the local search only searches the subject of the issue.

Remote redmine search

This mode uses the Redmine search engine to find issues. If you need an advanced search, you should choose remote search.
This allows you to search in all searchable fields (including custom fields), find issues that are not assigned to you or issues that have already been closed.

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Both search modes have their own advantages and limitations, depending on what you want to find. So just pick the correct search mode at the right time.

Tip: You can easily switch search mode by pressing CTRL + M without using the mode picker.

[Copilot]

Pull request overview

This PR enhances the search functionality by introducing two distinct search modes: local search (for searching through cached issues) and remote Redmine search (for comprehensive server-side searching). The change replaces the previous automatic "extended search" feature with an explicit mode selection, giving users more control over their search experience. A keyboard shortcut (CTRL+M) allows quick toggling between modes.

• Removed the extendedSearch setting and replaced it with a mode-based search system
• Refactored search components into IssueSearch and TimerSearch with context-based state management
• Updated the Redmine API to support more flexible search options (titles-only, open issues, assigned to me)

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/provider/SettingsProvider.tsx	Removed deprecated extendedSearch feature flag
src/pages/SettingsPage.tsx	Removed UI controls for extendedSearch setting
src/pages/TimersPage.tsx	Refactored to use new TimerSearch component with context
src/pages/IssuesPage.tsx	Refactored to use new IssueSearch component and filter context pattern
src/lang/*.json	Updated translations for new search modes and removed old extended search strings
src/hooks/useTimers.ts	Updated to use new TimerSearchContext type
src/hooks/useSearch.ts	Deleted old search hook
src/hooks/useRedmineSearch.ts	New hook implementing remote Redmine search with customizable options
src/hooks/useMyIssues.ts	Simplified by removing inline filtering logic, now handles only data fetching
src/hooks/useIssues.ts	Removed search parameter, simplified to pure data fetching
src/hooks/useHotkey.ts	Changed parameter order to be more intuitive (hotkey, callback, enabled)
src/components/ui/field.tsx	Added FieldInfo component for displaying tooltips
src/components/ui/dropdown-menu.tsx	New dropdown menu component for mode selection UI
src/components/timer/TimerSearch.tsx	New search component for timers page with local search only
src/components/timer/EditTimer.tsx	Updated to use new useHotKey signature
src/components/issue/Search.tsx	Deleted old search component
src/components/issue/IssueSearch.tsx	New search component with mode selection, remote search options, and context
src/components/issue/IssuesList.tsx	Updated to use new search context pattern
src/components/issue/Filter.tsx	Refactored to provider/consumer pattern with context API
src/components/form/ToggleField.tsx	Added support for description and info tooltip props
src/api/redmine.ts	Renamed and enhanced search methods with more flexible options
README.md	Updated feature compatibility table with new search terminology

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