Migrate: All Icons from Flowbite to Lucide

[dokterbob]

Objective

Replace all Flowbite icons with Lucide icons throughout the application.

Icon Usage Locations

• Layout navigation
• Chat components
• Action buttons
• Landing page
• Language switcher
• Theme toggle

Complete Icon Migration Map

Component	Flowbite Icon	Lucide Icon
Sign out	ArrowLeftToBracketOutline	LogOut
App logo	MessagesOutline	MessageSquare
User menu	UserOutline	User
Language	GlobeOutline	Globe
Edit	PenOutline	PenLine
Error	ExclamationCircleOutline	AlertCircle
Regenerate	ArrowsRepeatOutline	RefreshCw
Retry	RefreshOutline	RotateCw
Tools	ToolsOutline	Wrench
Success	CheckCircleOutline	CheckCircle
Pending	ClockOutline	Clock
Expand	AngleRightOutline	ChevronRight
CTA Arrow	ArrowRightOutline	ArrowRight
Like	ThumbsUpOutline	ThumbsUp
Dislike	ThumbsDownOutline	ThumbsDown
Send	PaperPlaneSolid	Send
Video	VideoCameraSolid	Video
Light mode	SunSolid	Sun
Dark mode	MoonSolid	Moon
Copy	ClipboardCleanSolid	Clipboard
Check	CheckOutline	Check

Tasks

• Update all icon imports in each component
• Adjust icon sizes (Lucide uses different sizing)
• Update icon class names and styling
• Test all icons in light/dark modes
• Verify icon alignment and spacing
• Remove flowbite-svelte-icons package

Size Mapping

• Flowbite size="xs" → Lucide class="h-3 w-3"
• Flowbite size="sm" → Lucide class="h-4 w-4"
• Flowbite size="md" → Lucide class="h-5 w-5"

Acceptance Criteria

• All icons display correctly
• Consistent sizing across app
• No missing icons
• Icons align properly in buttons/menus