feat: Align Issue filters UI with Machine filters design

[timothyfroehlich]

Goal

Align the IssueFilters component with the newly implemented MachineFilters design to ensure a consistent user experience across the application.

Current design (Issue filters)

• Single row with many filters.
• Can feel cramped on smaller screens or with many active filters.

New design (Machine filters)

• Search bar with inline badges: Higher contrast, cleaner input.
• Two-line layout:
  • First line: Search bar and Sort dropdown.
  • Second line: Functional filters (Status, Owner, etc.) in a row of multi-selects.
• Improved "Clear All" positioning: Next to the sort dropdown for better visibility.

Implementation details

• Update src/components/issues/IssueFilters.tsx to follow the layout pattern established in src/components/machines/MachineFilters.tsx.
• Ensure all current issue filters (Machine, Severity, Priority, Assignee, Reporter, Frequency, Watching, Date Range) are correctly moved to the second line or handled in a responsive layout.