feat(mobile): Sidebar drawer <1024px + Modal/Sheet fullscreen <880px

Per design_handoff_ordinis_mdm/README.md responsive table (line 464-465):
- ≤1024px: Sidebar becomes overlay drawer (hamburger в TopBar)
- ≤880px:  Drawers и modals fullscreen (100vw × 100dvh, no border-radius)

Implementation:

src/components/layout/Sidebar.tsx
  - Extracted SidebarContent (logo + nav + user block) для DRY
  - Desktop <Sidebar /> wraps SidebarContent в hidden lg:flex aside
  - New <MobileSidebar open onClose /> — Sheet с тем же содержимым,
    260px wide, slides from left
  - SidebarLink принимает onClick → drawer auto-close при navigate

src/components/layout/TopBar.tsx
  - Optional onMenuClick prop — рендерит hamburger button (Menu icon
    из lucide-react) с lg:hidden
  - VersionBadge скрыт <md (768px) — diagnostic info, не critical UX

src/routes/__root.tsx
  - useState mobileNavOpen, передаём в MobileSidebar + TopBar

src/ui/components/dialog.tsx
  - SIZE_CLASSES получили  prefix (arbitrary Tailwind v4
    breakpoint per handoff exact 880px). На mobile <880px modal становится
    fullscreen (inset-0 w-full h-full no rounded), ≥880px — centered с
    translate + max-w из SIZE_CLASSES.

src/ui/components/sheet.tsx
  - size variants: sm:max-w-* → min-[880px]:max-w-*. На mobile <880px
    sheet берёт w-full (fullscreen drawer per handoff).

src/components/record/RecordDrawer.tsx
  - max-width переключатель 520/880 теперь применяется только ≥880px.
    На mobile drawer всегда fullscreen.

src/ui/components/language-switch.tsx
  - Display fallback: opt.short → opt.label → uppercase id.
    Previously показывал id ('ru-RU', 'en-US') когда short не был задан —
    теперь использует label ('RU', 'EN') как fallback.

Browser-verified в preview viewport 375×812:
  - Hamburger ☰ visible, click открывает Sheet с nav items
  - Backdrop fade + slide-from-left animation
  - TopBar fits в 375px (RU/EN compact, Sign in visible)
  - LoadingBlock + Alert text-wrap correctly

ordinis-admin-ui/src/ui/components/dialog.tsx

@@ -49,12 +49,15 @@ export const DialogOverlay = React.forwardRef<
   )
 })
 
+// Mobile <880px = fullscreen (per handoff line 465); ≥880px = centered с max-w.
+// Используем arbitrary `min-[880px]:` (Tailwind v4 inline breakpoint) для точной
+// границы — handoff specifically wants 880, не стандартный md (768) или lg (1024).
 const SIZE_CLASSES: Record<string, string> = {
-  sm: 'max-w-[440px]',
-  md: 'max-w-[560px]',
-  lg: 'max-w-[720px]',
-  xl: 'max-w-[880px]',
-  full: 'max-w-full max-h-full sm:max-w-[920px]',
+  sm: 'min-[880px]:max-w-[440px]',
+  md: 'min-[880px]:max-w-[560px]',
+  lg: 'min-[880px]:max-w-[720px]',
+  xl: 'min-[880px]:max-w-[880px]',
+  full: 'min-[880px]:max-w-[920px]',
 }
 
 export type DialogContentProps = React.ComponentPropsWithoutRef<typeof DialogPrimitive.Content> & {
@@ -72,7 +75,12 @@ export const DialogContent = React.forwardRef<
       <DialogPrimitive.Content
         ref={ref}
         className={cn(
-          'fixed left-1/2 top-1/2 z-50 grid w-full -translate-x-1/2 -translate-y-1/2 gap-4 border border-line bg-surface p-6 shadow-2xl duration-200 sm:rounded-lg',
+          'fixed z-50 grid gap-4 border border-line bg-surface p-6 shadow-2xl duration-200',
+          // Mobile <880px (per handoff): fullscreen 100vw × 100dvh, no corners,
+          // no centered transform. Editor body становится single-column natively.
+          'inset-0 w-full h-full',
+          // Desktop ≥880px: centered modal с rounded corners + max-w из SIZE_CLASSES.
+          'min-[880px]:left-1/2 min-[880px]:top-1/2 min-[880px]:inset-auto min-[880px]:h-auto min-[880px]:w-full min-[880px]:-translate-x-1/2 min-[880px]:-translate-y-1/2 min-[880px]:rounded-lg',
           'data-[state=open]:animate-in data-[state=closed]:animate-out',
           'data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0',
           'data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95',

ordinis-admin-ui/src/ui/components/language-switch.tsx

@@ -61,7 +61,10 @@ export function LanguageSwitch({
                 : 'text-mute hover:text-ink hover:bg-surface-2',
             )}
           >
-            {opt.short ?? v.toUpperCase()}
+            {/* Display priority: short → label (if compact like "RU"/"EN") →
+              * uppercase id. Label predominates когда caller передал human
+              * label типа "RU"/"EN" в options. */}
+            {opt.short ?? opt.label ?? v.toUpperCase()}
           </button>
         )
       })}

ordinis-admin-ui/src/ui/components/sheet.tsx

@@ -49,11 +49,13 @@ const sheetVariants = cva(
         left: 'inset-y-0 left-0 h-full border-r data-[state=closed]:slide-out-to-left data-[state=open]:slide-in-from-left',
         right: 'inset-y-0 right-0 h-full border-l data-[state=closed]:slide-out-to-right data-[state=open]:slide-in-from-right',
       },
+      // Per handoff (line 465): drawers fullscreen <880px, max-w на ≥880px.
+      // arbitrary breakpoint `min-[880px]:` гарантирует точную границу.
       size: {
-        sm: 'sm:max-w-sm w-full',
-        md: 'sm:max-w-[520px] w-full',
-        lg: 'sm:max-w-[720px] w-full',
-        xl: 'sm:max-w-[880px] w-full',
+        sm: 'min-[880px]:max-w-sm w-full',
+        md: 'min-[880px]:max-w-[520px] w-full',
+        lg: 'min-[880px]:max-w-[720px] w-full',
+        xl: 'min-[880px]:max-w-[880px] w-full',
       },
     },
     defaultVariants: { side: 'right', size: 'md' },