[VPAT-27] chore(security): disable autocomplete on sensitive input fields #8517

Disable autocomplete on authentication and security-related forms to prevent
browsers from storing sensitive credentials. This affects sign-in, password
reset, account security, and onboarding forms across admin, web, and space apps.

Modified components:
- Auth forms (email, password, unique code, forgot/reset/set password)
- Account security pages
- Instance setup and profile onboarding
- Shared UI components (auth-input, password-input)

apps/admin/app/(all)/(home)/sign-in-form.tsx

@@ -146,7 +146,7 @@ export function InstanceSignInForm() {
                 placeholder="name@company.com"
                 value={formData.email}
                 onChange={(e) => handleFormChange("email", e.target.value)}
-                autoComplete="on"
+                autoComplete="off"
                 autoFocus
               />
             </div>
@@ -165,7 +165,7 @@ export function InstanceSignInForm() {
                   placeholder="Enter your password"
                   value={formData.password}
                   onChange={(e) => handleFormChange("password", e.target.value)}
-                  autoComplete="on"
+                  autoComplete="off"
                 />
                 {showPassword ? (
                   <button