llm-multiverse-ui/implementation-plans/issue-019.md

Issue #19: Responsive layout and mobile support

Status: COMPLETED

Summary

Make the dashboard fully usable on mobile with collapsible sidebars, stacked layouts for small screens, touch-friendly tap targets, and no horizontal scrolling.

Changes

Chat Page (src/routes/chat/+page.svelte)

• Added hamburger menu button visible only on mobile (md:hidden) to toggle the session sidebar
• SessionSidebar rendered twice: always-visible wrapper for desktop (hidden md:flex) and a mobile drawer controlled by showSessionSidebar state
• Config sidebar now passes onClose callback to enable closing on mobile
• Nav links (Lineage, Memory, Audit) hidden on small screens (hidden sm:inline-flex)
• Config button shows gear icon on small screens, text label on larger screens
• Added overflow-hidden to root container to prevent horizontal scrolling
• All header padding reduced on mobile (px-3 vs md:px-4)

SessionSidebar (src/lib/components/SessionSidebar.svelte)

• Accepts new open and onClose props for mobile drawer control
• On mobile: renders as fixed overlay (fixed inset-y-0 left-0 z-50) with slide-in transition
• On desktop: renders as relative-positioned sidebar with no transition (md:relative md:translate-x-0)
• Backdrop overlay (bg-black/50) shown on mobile when sidebar is open
• Close button visible only on mobile (md:hidden)
• Session selection and new chat actions auto-close the sidebar on mobile

ConfigSidebar (src/lib/components/ConfigSidebar.svelte)

• Accepts new optional onClose prop
• On mobile: renders as fixed overlay from the right (fixed inset-y-0 right-0 z-50)
• On desktop: renders as relative-positioned sidebar (md:relative md:z-auto)
• Backdrop overlay shown when onClose is provided (mobile only)
• Close button visible only on mobile

MessageInput (src/lib/components/MessageInput.svelte)

• Send button has min-h-[44px] min-w-[44px] for touch-friendly 44px tap target
• Textarea uses text-base on mobile (prevents iOS zoom) and md:text-sm on desktop
• Reduced padding on mobile (p-3 vs md:p-4)

MessageBubble (src/lib/components/MessageBubble.svelte)

• Increased max-width on mobile from 75% to 85% (max-w-[85%] md:max-w-[75%])
• Slightly reduced padding on mobile

Home Page (src/routes/+page.svelte)

• Nav cards stack vertically on mobile (flex-col sm:flex-row)
• Full-width centered layout with max-w-md constraint on mobile
• Larger touch targets for nav links (py-3 sm:py-2)
• Added horizontal padding to prevent edge clipping

Lineage Page (src/routes/lineage/+page.svelte)

• Content area stacks vertically on mobile (flex-col md:flex-row)
• Detail panel renders as fixed overlay on mobile with backdrop
• Reduced padding on mobile
• "Sample Data" badge hidden on very small screens

Memory Page (src/routes/memory/+page.svelte)

• Filters stack vertically on mobile (flex-col sm:flex-row)
• Reduced padding on mobile
• "Sample Data" badge hidden on very small screens

Audit Page (src/routes/audit/+page.svelte)

• Filters stack vertically on mobile (flex-col sm:flex-row)
• Session select constrained to prevent horizontal overflow (min-w-0 max-w-full truncate)
• Reduced padding on mobile
• "Sample Data" badge hidden on very small screens

Acceptance Criteria Met

• Sidebars collapsible on mobile (hamburger menu for sessions, tap to close)
• Stacked layout for screens < 768px (md breakpoint = 768px)
• Chat input remains accessible and usable on mobile (always at bottom, full width)
• Touch-friendly tap targets (min 44px on send button, hamburger, config toggle)
• No horizontal scrolling on any viewport (overflow-hidden on containers)
• Works on common mobile breakpoints (320px, 375px, 414px) via responsive Tailwind classes

Quality Gates

• npm run build - PASSED
• npm run lint - PASSED (0 errors)
• npm run check - PASSED (0 errors, 0 warnings)