feat(web/ui5): migrate auth pages and CreateWorkspaceModal to @bytelyst/ui primitives

Sprint C / UI5 — migrate the highest-leverage user-facing forms off the
legacy 'input-shell' / inline-style pattern onto the @bytelyst/ui Input,
Textarea, and AlertBanner primitives via the local Primitives.tsx adapter.

Adapter additions (web/src/components/ui/Primitives.tsx):
- Re-export AlertBanner, FormSection, and FieldGrid from @bytelyst/ui so
  product code never imports from the underlying package directly.

Migrated screens:
- web/src/app/(auth)/login/page.tsx
- web/src/app/(auth)/register/page.tsx
- web/src/app/(auth)/forgot-password/page.tsx
- web/src/components/CreateWorkspaceModal.tsx

Each migration replaces the ad-hoc 'input-shell' inputs and manual
label/error/success divs with the Input (label + hint props), Textarea,
and AlertBanner (tone='error'|'success') primitives. Inline style blocks
are replaced with Tailwind utility classes that read from the existing
--nl-* CSS custom properties so the visual tokens remain unchanged.

The 3 auth pages alone remove 9 input-shell call sites; the
CreateWorkspaceModal removes 2 more.

Verified:
- pnpm --filter @notelett/web run typecheck: passes
- pnpm --filter @notelett/web run test: 96/96 pass
- pnpm run verify: end-to-end green (backend 380/380, web 96/96, mobile 97/97)

web/src/app/(auth)/forgot-password/page.tsx

@@ -2,7 +2,7 @@
 
 import { useState, type FormEvent } from "react";
 import Link from "next/link";
-import { Button, Card } from "@/components/ui/Primitives";
+import { AlertBanner, Button, Card, Input } from "@/components/ui/Primitives";
 import { useAuth } from "@/lib/auth";
 
 export default function ForgotPasswordPage() {
@@ -17,35 +17,32 @@ export default function ForgotPasswordPage() {
 
   return (
     <Card padding="lg">
-    <form onSubmit={handleSubmit} style={{ display: "grid", gap: "var(--nl-space-5)" }}>
-      <h1 style={{ margin: 0, fontSize: "var(--nl-fs-xl)" }}>Reset password</h1>
-      <p style={{ margin: 0, color: "var(--nl-text-secondary)", fontSize: "var(--nl-fs-sm)" }}>
+      <form onSubmit={handleSubmit} className="grid gap-5">
+        <h1 className="m-0 text-[length:var(--nl-fs-xl)]">Reset password</h1>
+        <p className="m-0 text-[length:var(--nl-fs-sm)] text-[color:var(--nl-text-secondary)]">
           Enter your email and we&apos;ll send a reset link if the account exists.
         </p>
 
         {error && (
-        <div role="alert" style={{ padding: "10px 14px", borderRadius: "var(--nl-radius-sm)", background: "var(--nl-danger-muted)", color: "var(--nl-danger)", fontSize: "var(--nl-fs-sm)" }}>
+          <AlertBanner tone="error" role="alert">
             {error}
-        </div>
+          </AlertBanner>
         )}
 
         {success && (
-        <div role="status" style={{ padding: "10px 14px", borderRadius: "var(--nl-radius-sm)", background: "var(--nl-success-muted)", color: "var(--nl-status-success)", fontSize: "var(--nl-fs-sm)" }}>
+          <AlertBanner tone="success" role="status">
             {success}
-        </div>
+          </AlertBanner>
         )}
 
-      <label style={{ display: "grid", gap: 6 }}>
-        <span style={{ fontSize: "var(--nl-fs-sm)", color: "var(--nl-text-secondary)" }}>Email</span>
-        <input
+        <Input
           type="email"
+          label="Email"
           required
           autoComplete="email"
-          className="input-shell"
           value={email}
           onChange={(e) => setEmail(e.target.value)}
         />
-      </label>
 
         <Button
           type="submit"
@@ -55,8 +52,10 @@ export default function ForgotPasswordPage() {
           Send reset link
         </Button>
 
-      <p style={{ textAlign: "center", fontSize: "var(--nl-fs-sm)" }}>
-        <Link href="/login" style={{ color: "var(--nl-accent-primary)" }}>Back to sign in</Link>
+        <p className="text-center text-[length:var(--nl-fs-sm)]">
+          <Link href="/login" className="text-[color:var(--nl-accent-primary)]">
+            Back to sign in
+          </Link>
         </p>
       </form>
     </Card>

web/src/app/(auth)/login/page.tsx

@@ -3,7 +3,7 @@
 import { useState, type FormEvent } from "react";
 import Link from "next/link";
 import { useRouter } from "next/navigation";
-import { Button, Card } from "@/components/ui/Primitives";
+import { AlertBanner, Button, Card, Input } from "@/components/ui/Primitives";
 import { useAuth } from "@/lib/auth";
 
 export default function LoginPage() {
@@ -21,38 +21,32 @@ export default function LoginPage() {
 
   return (
     <Card padding="lg">
-    <form onSubmit={handleSubmit} style={{ display: "grid", gap: "var(--nl-space-5)" }}>
-      <h1 style={{ margin: 0, fontSize: "var(--nl-fs-xl)" }}>Sign in</h1>
+      <form onSubmit={handleSubmit} className="grid gap-5">
+        <h1 className="m-0 text-[length:var(--nl-fs-xl)]">Sign in</h1>
 
         {error && (
-        <div role="alert" style={{ padding: "10px 14px", borderRadius: "var(--nl-radius-sm)", background: "var(--nl-danger-muted)", color: "var(--nl-danger)", fontSize: "var(--nl-fs-sm)" }}>
+          <AlertBanner tone="error" role="alert">
             {error}
-        </div>
+          </AlertBanner>
         )}
 
-      <label style={{ display: "grid", gap: 6 }}>
-        <span style={{ fontSize: "var(--nl-fs-sm)", color: "var(--nl-text-secondary)" }}>Email</span>
-        <input
+        <Input
           type="email"
+          label="Email"
           required
           autoComplete="email"
-          className="input-shell"
           value={email}
           onChange={(e) => setEmail(e.target.value)}
         />
-      </label>
 
-      <label style={{ display: "grid", gap: 6 }}>
-        <span style={{ fontSize: "var(--nl-fs-sm)", color: "var(--nl-text-secondary)" }}>Password</span>
-        <input
+        <Input
           type="password"
+          label="Password"
           required
           autoComplete="current-password"
-          className="input-shell"
           value={password}
           onChange={(e) => setPassword(e.target.value)}
         />
-      </label>
 
         <Button
           type="submit"
@@ -62,9 +56,13 @@ export default function LoginPage() {
           Sign in
         </Button>
 
-      <div style={{ display: "flex", justifyContent: "space-between", fontSize: "var(--nl-fs-sm)" }}>
-        <Link href="/forgot-password" style={{ color: "var(--nl-accent-primary)" }}>Forgot password?</Link>
-        <Link href="/register" style={{ color: "var(--nl-accent-primary)" }}>Create account</Link>
+        <div className="flex items-center justify-between text-[length:var(--nl-fs-sm)]">
+          <Link href="/forgot-password" className="text-[color:var(--nl-accent-primary)]">
+            Forgot password?
+          </Link>
+          <Link href="/register" className="text-[color:var(--nl-accent-primary)]">
+            Create account
+          </Link>
         </div>
       </form>
     </Card>

web/src/app/(auth)/register/page.tsx

@@ -3,7 +3,7 @@
 import { useState, type FormEvent } from "react";
 import Link from "next/link";
 import { useRouter } from "next/navigation";
-import { Button, Card } from "@/components/ui/Primitives";
+import { AlertBanner, Button, Card, Input } from "@/components/ui/Primitives";
 import { useAuth } from "@/lib/auth";
 
 export default function RegisterPage() {
@@ -22,51 +22,43 @@ export default function RegisterPage() {
 
   return (
     <Card padding="lg">
-    <form onSubmit={handleSubmit} style={{ display: "grid", gap: "var(--nl-space-5)" }}>
-      <h1 style={{ margin: 0, fontSize: "var(--nl-fs-xl)" }}>Create account</h1>
+      <form onSubmit={handleSubmit} className="grid gap-5">
+        <h1 className="m-0 text-[length:var(--nl-fs-xl)]">Create account</h1>
 
         {error && (
-        <div role="alert" style={{ padding: "10px 14px", borderRadius: "var(--nl-radius-sm)", background: "var(--nl-danger-muted)", color: "var(--nl-danger)", fontSize: "var(--nl-fs-sm)" }}>
+          <AlertBanner tone="error" role="alert">
             {error}
-        </div>
+          </AlertBanner>
         )}
 
-      <label style={{ display: "grid", gap: 6 }}>
-        <span style={{ fontSize: "var(--nl-fs-sm)", color: "var(--nl-text-secondary)" }}>Display name</span>
-        <input
+        <Input
           type="text"
+          label="Display name"
           required
           autoComplete="name"
-          className="input-shell"
           value={displayName}
           onChange={(e) => setDisplayName(e.target.value)}
         />
-      </label>
 
-      <label style={{ display: "grid", gap: 6 }}>
-        <span style={{ fontSize: "var(--nl-fs-sm)", color: "var(--nl-text-secondary)" }}>Email</span>
-        <input
+        <Input
           type="email"
+          label="Email"
           required
           autoComplete="email"
-          className="input-shell"
           value={email}
           onChange={(e) => setEmail(e.target.value)}
         />
-      </label>
 
-      <label style={{ display: "grid", gap: 6 }}>
-        <span style={{ fontSize: "var(--nl-fs-sm)", color: "var(--nl-text-secondary)" }}>Password</span>
-        <input
+        <Input
           type="password"
+          label="Password"
           required
           minLength={8}
           autoComplete="new-password"
-          className="input-shell"
           value={password}
           onChange={(e) => setPassword(e.target.value)}
+          hint="Minimum 8 characters"
         />
-      </label>
 
         <Button
           type="submit"
@@ -76,9 +68,11 @@ export default function RegisterPage() {
           Create account
         </Button>
 
-      <p style={{ textAlign: "center", fontSize: "var(--nl-fs-sm)", color: "var(--nl-text-secondary)" }}>
+        <p className="text-center text-[length:var(--nl-fs-sm)] text-[color:var(--nl-text-secondary)]">
           Already have an account?{" "}
-        <Link href="/login" style={{ color: "var(--nl-accent-primary)" }}>Sign in</Link>
+          <Link href="/login" className="text-[color:var(--nl-accent-primary)]">
+            Sign in
+          </Link>
         </p>
       </form>
     </Card>

web/src/components/CreateWorkspaceModal.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { useState, type FormEvent } from "react";
-import { Button, Card } from "@/components/ui/Primitives";
+import { AlertBanner, Button, Card, Input, Textarea } from "@/components/ui/Primitives";
 import { createWorkspace } from "@/lib/notes-client";
 
 interface Props {
@@ -38,34 +38,47 @@ export function CreateWorkspaceModal({ onCreated, onClose }: Props) {
 
   return (
     <div
-      style={{ position: "fixed", inset: 0, background: "var(--nl-overlay-scrim)", display: "flex", alignItems: "center", justifyContent: "center", zIndex: 1000 }}
-      onClick={(e) => { if (e.target === e.currentTarget) onClose(); }}
+      className="fixed inset-0 z-[1000] flex items-center justify-center bg-[color:var(--nl-overlay-scrim)]"
+      onClick={(e) => {
+        if (e.target === e.currentTarget) onClose();
+      }}
     >
-      <Card
-        padding="lg"
-        style={{ width: "100%", maxWidth: 480 }}
-      >
-      <form
-        onSubmit={handleSubmit}
-        style={{ display: "grid", gap: "var(--nl-space-4)" }}
-      >
-        <div style={{ fontSize: "var(--nl-fs-xl)", fontWeight: 700 }}>Create Workspace</div>
+      <Card padding="lg" className="w-full max-w-[480px]">
+        <form onSubmit={handleSubmit} className="grid gap-4">
+          <div className="text-[length:var(--nl-fs-xl)] font-bold">Create Workspace</div>
 
-        {error && <div style={{ color: "var(--nl-danger)", fontSize: "var(--nl-fs-sm)" }}>{error}</div>}
+          {error && (
+            <AlertBanner tone="error" role="alert">
+              {error}
+            </AlertBanner>
+          )}
 
-        <label style={{ display: "grid", gap: 6 }}>
-          <span style={{ fontWeight: 600, fontSize: "var(--nl-fs-sm)" }}>Name</span>
-          <input className="input-shell" type="text" required value={name} onChange={(e) => setName(e.target.value)} aria-label="Workspace name" autoFocus />
-        </label>
+          <Input
+            type="text"
+            label="Name"
+            required
+            value={name}
+            onChange={(e) => setName(e.target.value)}
+            aria-label="Workspace name"
+            autoFocus
+          />
 
-        <label style={{ display: "grid", gap: 6 }}>
-          <span style={{ fontWeight: 600, fontSize: "var(--nl-fs-sm)" }}>Description</span>
-          <textarea className="input-shell" value={description} onChange={(e) => setDescription(e.target.value)} rows={3} style={{ resize: "vertical" }} aria-label="Workspace description" />
-        </label>
+          <Textarea
+            label="Description"
+            value={description}
+            onChange={(e) => setDescription(e.target.value)}
+            rows={3}
+            className="resize-y"
+            aria-label="Workspace description"
+          />
 
-        <div style={{ display: "flex", justifyContent: "flex-end", gap: "var(--nl-space-3)" }}>
-          <Button type="button" variant="secondary" onClick={onClose}>Cancel</Button>
-          <Button type="submit" disabled={!name.trim() || saving} loading={saving}>Create</Button>
+          <div className="flex justify-end gap-3">
+            <Button type="button" variant="secondary" onClick={onClose}>
+              Cancel
+            </Button>
+            <Button type="submit" disabled={!name.trim() || saving} loading={saving}>
+              Create
+            </Button>
           </div>
         </form>
       </Card>

web/src/components/ui/Primitives.tsx

@@ -1,4 +1,7 @@
 import {
+  AlertBanner as BytelystAlertBanner,
+  FormSection as BytelystFormSection,
+  FieldGrid as BytelystFieldGrid,
   AppShell as BytelystAppShell,
   AppShellMain as BytelystAppShellMain,
   AppShellMobileToggle as BytelystAppShellMobileToggle,
@@ -77,6 +80,9 @@ import {
   type DataListItemProps,
   type DataListProps,
   type DiffCardProps,
+  type AlertBannerProps,
+  type FormSectionProps,
+  type FieldGridProps,
   type EmptyStateProps,
   type IconButtonProps,
   type InputProps,
@@ -360,6 +366,18 @@ export function EmptyState({ className, ...props }: EmptyStateProps) {
   return <BytelystEmptyState className={mergeClassNames("rounded-[var(--nl-radius-md)]", className)} {...props} />;
 }
 
+export function AlertBanner({ className, ...props }: AlertBannerProps) {
+  return <BytelystAlertBanner className={mergeClassNames("rounded-[var(--nl-radius-sm)]", className)} {...props} />;
+}
+
+export function FormSection({ className, ...props }: FormSectionProps) {
+  return <BytelystFormSection className={className} {...props} />;
+}
+
+export function FieldGrid({ className, ...props }: FieldGridProps) {
+  return <BytelystFieldGrid className={className} {...props} />;
+}
+
 export function LoadingSpinner({ className, ...props }: LoadingSpinnerProps) {
   return <BytelystLoadingSpinner className={className} {...props} />;
 }