chore: replace emojis with Lucide icons (#68)
- Replace all emojis with Lucide React icons for better accessibility and consistency
- Update page header: rocket emoji → Rocket icon
- Update tab navigation: package, hard drive, folder open icons
- Update terminal controls: Play, Square, Trash2, X icons
- Update filter bar: Package, Monitor, Wrench, Server, FileText, Calendar icons
- Update version display: Check icon for up-to-date status
- Replace emoji prefixes in terminal and error messages with text labels
- Remove unused icon imports
6c2868f8b9