refactor(ui): form primitive polish + invoice page grid alignment (#475)

* refactor(ui): form primitive polish + invoice page grid alignment

Three things that were dropped from the previous design-refresh squash
and one new fix on invoices/[id].

Form primitives — tighter focus rings, match Button transition cadence:
- Input/Textarea/Select trigger: transition-colors duration-200 → 150
- Focus ring: border-primary/{50,60} + ring-primary/{20,35} →
  border-primary + ring-primary/20 (full-opacity border with a
  faint glow ring; cleaner than the opacity-stacked version)
- SelectContent: border-border/60 → border-border, shadow-md →
  halved --shadow-md token
- SelectSeparator: bg-border/50 → bg-border

invoices/new — single grid with explicit row placement so the
second-row cards (Anteckningar / Summering) align across columns
regardless of how tall the first-row cards end up:
- Flatten the two column wrappers into one grid
- Add lg:auto-rows-min lg:items-start
- Each card pinned with lg:col-{start,span} + lg:row-start
- Fakturarader now spans col 1-3 (full width) on lg+

invoices/[id] — same alignment fix on the detail view:
- Flatten the column wrappers into one grid
- Kund (col 1-2) + Fakturarader (col 1-2) + Anteckningar (col 1-2,
  conditional) pinned to rows 1-3
- All right-side cards (Detaljer + conditional status cards) stay
  grouped in a single wrapper at lg:col-start-3 lg:row-span-3, so
  they stack naturally without disrupting the left-column rows

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* refactor(ui): address PR review

- invoices/[id]: add lg:auto-rows-min to match invoices/new and prevent
  unintended row expansion from any future auto-placed items
- Clean up stale indentation in both invoice pages — Card children
  were 2 spaces too deep after the wrapper divs were removed

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

components/ui/input.tsx

@@ -9,7 +9,7 @@ const Input = React.forwardRef<HTMLInputElement, InputProps>(
       <input
         type={type}
         className={cn(
-          "flex h-10 w-full rounded-lg border border-input bg-card px-4 py-2 text-sm transition-colors duration-200 file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground/60 focus-visible:outline-none focus-visible:border-primary/60 focus-visible:ring-1 focus-visible:ring-primary/35 disabled:cursor-not-allowed disabled:opacity-50",
+          "flex h-10 w-full rounded-lg border border-input bg-card px-4 py-2 text-sm transition-colors duration-150 file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground/60 focus-visible:outline-none focus-visible:border-primary focus-visible:ring-1 focus-visible:ring-primary/20 disabled:cursor-not-allowed disabled:opacity-50",
           className
         )}
         ref={ref}

components/ui/select.tsx

@@ -18,7 +18,7 @@ const SelectTrigger = React.forwardRef<
   <SelectPrimitive.Trigger
     ref={ref}
     className={cn(
-      "flex h-10 w-full items-center justify-between rounded-lg border border-input bg-card px-4 py-2 text-sm transition-colors duration-200 placeholder:text-muted-foreground/60 focus:outline-none focus:border-primary/60 focus:ring-1 focus:ring-primary/35 disabled:cursor-not-allowed disabled:opacity-50 [&>span]:line-clamp-1",
+      "flex h-10 w-full items-center justify-between rounded-lg border border-input bg-card px-4 py-2 text-sm transition-colors duration-150 placeholder:text-muted-foreground/60 focus:outline-none focus:border-primary focus:ring-1 focus:ring-primary/20 disabled:cursor-not-allowed disabled:opacity-50 [&>span]:line-clamp-1",
       className
     )}
     {...props}
@@ -74,7 +74,7 @@ const SelectContent = React.forwardRef<
     <SelectPrimitive.Content
       ref={ref}
       className={cn(
-        "relative z-50 max-h-96 min-w-[8rem] overflow-hidden rounded-lg border border-border/60 bg-popover text-popover-foreground shadow-md 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 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+        "relative z-50 max-h-96 min-w-[8rem] overflow-hidden rounded-lg border border-border bg-popover text-popover-foreground shadow-[var(--shadow-md)] 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 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
         position === "popper" &&
           "data-[side=bottom]:translate-y-1 data-[side=left]:-translate-x-1 data-[side=right]:translate-x-1 data-[side=top]:-translate-y-1",
         className
@@ -138,7 +138,7 @@ const SelectSeparator = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <SelectPrimitive.Separator
     ref={ref}
-    className={cn("-mx-1 my-1 h-px bg-border/50", className)}
+    className={cn("-mx-1 my-1 h-px bg-border", className)}
     {...props}
   />
 ))

components/ui/textarea.tsx

@@ -8,7 +8,7 @@ const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
     return (
       <textarea
         className={cn(
-          "flex min-h-[100px] w-full rounded-lg border border-input bg-card px-4 py-3 text-sm transition-colors duration-200 placeholder:text-muted-foreground/60 focus-visible:outline-none focus-visible:border-primary/50 focus-visible:ring-1 focus-visible:ring-primary/20 disabled:cursor-not-allowed disabled:opacity-50 resize-none",
+          "flex min-h-[100px] w-full rounded-lg border border-input bg-card px-4 py-3 text-sm transition-colors duration-150 placeholder:text-muted-foreground/60 focus-visible:outline-none focus-visible:border-primary focus-visible:ring-1 focus-visible:ring-primary/20 disabled:cursor-not-allowed disabled:opacity-50 resize-none",
           className
         )}
         ref={ref}