feat!: complete visual redesign → 1.0.0

BREAKING: version bump to 1.0.0

New design system:
- Emerald/teal color palette with semantic tokens (success, warning, destructive)
- Light/dark mode toggle with localStorage persistence and anti-FOUC
- CSS custom properties via Tailwind darkMode: 'class'
- Zero new dependencies — all primitives hand-rolled

Foundation:
- 70+ inline SVG icons (no external icon library)
- ThemeProvider + useTheme hook
- cn() utility for conditional classes

UI primitives (web/src/components/ui/):
- Button (6 variants, 4 sizes)
- Input, Label, Card with slots, Badge (6 variants + sizes)
- Switch (animated), Checkbox, Separator
- Skeleton, Spinner, EmptyState
- Toast system with auto-dismiss (success/error/warning/info)
- Dialog with focus trap + escape/click-outside
- ConfirmDialog replacing native confirm()
- DropdownMenu with keyboard support

Layout & navigation:
- Sidebar with icon+label nav, active indicator, responsive drawer on mobile
- Topbar for <lg viewports with hamburger
- PageHeader with title/description/actions pattern
- UserMenu with avatar + dropdown (change password, logout)
- DirtyBanner redesigned with semantic styling

Pages redesigned:
- Login: centered card with gradient background
- Dashboard: 4 KPI tiles, disk usage bars, services grid, recent activity
- Users: table with search, empty state, edit modal
- Files: breadcrumbs, drag-drop upload zone, SVG file icons, rename/delete
- Samba: card list with badges, edit modal with PathField
- NFS: card list with client chips, client editor
- Storage: tabs (Mover/SnapRAID/Jobs), real-time job log streaming
- Log: timeline grouped by date with filters
- Settings: watched mounts, import actions, system info
- NotFound: friendly 404 page

Polish:
- Toast notifications replace all native alert()/confirm()
- Tailwind animations (dialog-enter, toast-enter/leave, dropdown-enter)
- Custom scrollbar styling
- Focus-visible rings
- Skeleton loading states across all pages

Makefile

@@ -1,5 +1,5 @@
 BINARY=nasctl
-VERSION?=0.8.3
+VERSION?=1.0.0
 GO?=go
 LDFLAGS=-s -w -X github.com/darroyo/nasctl/internal/web.Version=$(VERSION) -X github.com/darroyo/nasctl/internal/web.Commit=$(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
 BUILD_FLAGS=CGO_ENABLED=0