Merge branch 'feature/member-invitation-links'

Add member invitation links: passwordless first login with forced password
set. Admins generate a single-use, 7-day link (copy or email); the member
opens it to set their own password and is logged straight in. Auto-creates a
passwordless account for members without one; re-issuing revokes prior links.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

API/ROLAC.API/Controllers/AuthController.cs

@@ -3,6 +3,7 @@ using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
 using ROLAC.API.DTOs.Auth;
+using ROLAC.API.DTOs.Invitations;
 using ROLAC.API.Entities;
 using ROLAC.API.Services;
 
@@ -16,13 +17,16 @@ public class AuthController : ControllerBase
     private const int    CookieMaxAge = 30 * 24 * 60 * 60; // 30 days in seconds
 
     private readonly IAuthService         _authService;
+    private readonly IInvitationService   _invitations;
     private readonly UserManager<AppUser> _userManager;
     private readonly IWebHostEnvironment  _env;
 
     public AuthController(
-        IAuthService authService, UserManager<AppUser> userManager, IWebHostEnvironment env)
+        IAuthService authService, IInvitationService invitations,
+        UserManager<AppUser> userManager, IWebHostEnvironment env)
     {
         _authService = authService;
+        _invitations = invitations;
         _userManager = userManager;
         _env         = env;
     }
@@ -186,6 +190,45 @@ public class AuthController : ControllerBase
         return NoContent();
     }
 
+    // -------------------------------------------------------------------------
+    // GET /api/auth/invitation/validate?token=...
+    // -------------------------------------------------------------------------
+
+    /// <summary>
+    /// Checks whether an invitation token can still be used. Anonymous so the public
+    /// "set your password" page can decide what to show before the member types anything.
+    /// </summary>
+    [HttpGet("invitation/validate")]
+    [AllowAnonymous]
+    [ProducesResponseType(typeof(ValidateInvitationResult), StatusCodes.Status200OK)]
+    public async Task<IActionResult> ValidateInvitation([FromQuery] string token)
+        => Ok(await _invitations.ValidateAsync(token));
+
+    // -------------------------------------------------------------------------
+    // POST /api/auth/accept-invitation
+    // -------------------------------------------------------------------------
+
+    /// <summary>
+    /// Consumes an invitation: sets the account password and, on success, logs the member in
+    /// (issues the access token + refresh cookie) so first login lands straight on the portal.
+    /// </summary>
+    [HttpPost("accept-invitation")]
+    [AllowAnonymous]
+    [ProducesResponseType(typeof(LoginResponse), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    public async Task<IActionResult> AcceptInvitation([FromBody] AcceptInvitationRequest request)
+    {
+        var (user, error) = await _invitations.AcceptAsync(request.Token, request.NewPassword);
+        if (user is null)
+            return BadRequest(new { message = error });
+
+        var ip     = HttpContext.Connection.RemoteIpAddress?.ToString();
+        var device = Request.Headers.UserAgent.FirstOrDefault();
+        var (response, raw) = await _authService.IssueSessionAsync(user, ip, device);
+        SetRefreshCookie(raw);
+        return Ok(response);
+    }
+
     // -------------------------------------------------------------------------
     // Private helpers
     // -------------------------------------------------------------------------

API/ROLAC.API/Controllers/InvitationsController.cs

@@ -0,0 +1,39 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using ROLAC.API.Authorization;
+using ROLAC.API.DTOs.Invitations;
+using ROLAC.API.Services;
+
+namespace ROLAC.API.Controllers;
+
+/// <summary>
+/// Admin endpoints for generating and e-mailing first-login invitation links.
+/// The public consume/validate endpoints live on <see cref="AuthController"/> so they can set the
+/// refresh-token cookie and stay anonymous.
+/// </summary>
+[ApiController]
+[Route("api/invitations")]
+[Authorize]
+public class InvitationsController : ControllerBase
+{
+    private readonly IInvitationService _invitations;
+    public InvitationsController(IInvitationService invitations) => _invitations = invitations;
+
+    /// <summary>POST /api/invitations — generate a link for a member; returns { token, expiresAt }.</summary>
+    [HttpPost]
+    [HasPermission(Modules.Users, PermissionActions.Write)]
+    public async Task<IActionResult> Create([FromBody] CreateInvitationRequest request)
+    {
+        try   { return Ok(await _invitations.CreateAsync(request)); }
+        catch (InvalidOperationException ex) { return BadRequest(new { message = ex.Message }); }
+    }
+
+    /// <summary>POST /api/invitations/send — e-mail an already-generated link to the member.</summary>
+    [HttpPost("send")]
+    [HasPermission(Modules.Users, PermissionActions.Write)]
+    public async Task<IActionResult> Send([FromBody] SendInvitationRequest request)
+    {
+        try   { await _invitations.SendEmailAsync(request.MemberId, request.Link); return NoContent(); }
+        catch (InvalidOperationException ex) { return BadRequest(new { message = ex.Message }); }
+    }
+}

API/ROLAC.API/DTOs/Invitations/InvitationDtos.cs

@@ -0,0 +1,56 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace ROLAC.API.DTOs.Invitations;
+
+/// <summary>
+/// Admin request to generate a first-login invitation link for a member. If the member has no
+/// account yet, one is auto-created (no password) using <see cref="Email"/> or the member's email.
+/// </summary>
+public class CreateInvitationRequest
+{
+    [Required]
+    public int MemberId { get; set; }
+
+    /// <summary>Optional override for the login email when the member has none on file.</summary>
+    public string? Email { get; set; }
+
+    /// <summary>Roles to assign when an account is created. Defaults to ["member"].</summary>
+    public List<string>? Roles { get; set; }
+}
+
+/// <summary>Result of generating an invitation — the raw token is returned ONCE.</summary>
+public class CreateInvitationResult
+{
+    public string   Token     { get; set; } = null!;
+    public DateTime ExpiresAt { get; set; }
+}
+
+/// <summary>Admin request to e-mail an already-generated invitation link to the member.</summary>
+public class SendInvitationRequest
+{
+    [Required]
+    public int MemberId { get; set; }
+
+    [Required]
+    public string Link { get; set; } = null!;
+}
+
+/// <summary>Public result describing whether an invitation token can still be used.</summary>
+public class ValidateInvitationResult
+{
+    public bool    Valid      { get; set; }
+    public bool    Expired    { get; set; }
+    public string? MemberName { get; set; }
+    public string? Email      { get; set; }
+}
+
+/// <summary>Public request to consume an invitation and set the account password.</summary>
+public class AcceptInvitationRequest
+{
+    [Required]
+    public string Token { get; set; } = null!;
+
+    [Required]
+    [StringLength(128, MinimumLength = 8)]
+    public string NewPassword { get; set; } = null!;
+}

API/ROLAC.API/Data/AppDbContext.cs

@@ -10,7 +10,8 @@ public class AppDbContext : IdentityDbContext<AppUser, AppRole, string>
 {
     public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }
 
-    public DbSet<RefreshToken> RefreshTokens => Set<RefreshToken>();
+    public DbSet<RefreshToken>    RefreshTokens    => Set<RefreshToken>();
+    public DbSet<UserInvitation>  UserInvitations  => Set<UserInvitation>();
     public DbSet<Member>       Members       => Set<Member>();
     public DbSet<FamilyUnit>   FamilyUnits   => Set<FamilyUnit>();
     public DbSet<GivingCategory>  GivingCategories  => Set<GivingCategory>();
@@ -56,6 +57,23 @@ public class AppDbContext : IdentityDbContext<AppUser, AppRole, string>
             entity.Ignore(e => e.IsActive);
         });
 
+        // ── UserInvitation (single-use, expiring first-login links) ─────────
+        builder.Entity<UserInvitation>(entity =>
+        {
+            entity.HasKey(e => e.Id);
+            entity.HasIndex(e => e.TokenHash).IsUnique();
+            entity.Property(e => e.TokenHash).HasMaxLength(64).IsRequired();
+            entity.Property(e => e.UserId).HasMaxLength(450).IsRequired();
+            entity.Property(e => e.CreatedBy).HasMaxLength(450).IsRequired();
+            entity.HasIndex(e => e.UserId);
+            entity.HasOne(e => e.User).WithMany()
+                  .HasForeignKey(e => e.UserId).OnDelete(DeleteBehavior.Cascade);
+            entity.Ignore(e => e.IsExpired);
+            entity.Ignore(e => e.IsUsed);
+            entity.Ignore(e => e.IsRevoked);
+            entity.Ignore(e => e.IsActive);
+        });
+
         // ── AppUser (unchanged + new unique index on MemberId) ──────────────
         builder.Entity<AppUser>(entity =>
         {

API/ROLAC.API/Entities/Logging/AuditLog.cs

@@ -48,6 +48,8 @@ public static class AuditActions
     public const string PasswordChanged    = "PasswordChanged";
     public const string UserDeactivated    = "UserDeactivated";
     public const string PermissionChanged  = "PermissionChanged";
+    public const string InvitationCreated  = "InvitationCreated";
+    public const string InvitationAccepted = "InvitationAccepted";
     public const string CheckIssued        = "CheckIssued";
     public const string CheckVoided        = "CheckVoided";
     public const string ExpenseApproved    = "ExpenseApproved";
@@ -56,7 +58,8 @@ public static class AuditActions
     public static readonly IReadOnlyList<string> All =
     [
         Create, Update, Delete, Login, Logout, LoginFailed, RoleChanged,
-        PasswordChanged, UserDeactivated, PermissionChanged, CheckIssued,
+        PasswordChanged, UserDeactivated, PermissionChanged,
+        InvitationCreated, InvitationAccepted, CheckIssued,
         CheckVoided, ExpenseApproved, StatementFinalized,
     ];
 }

API/ROLAC.API/Entities/UserInvitation.cs

@@ -0,0 +1,35 @@
+namespace ROLAC.API.Entities;
+
+/// <summary>
+/// A single-use, expiring invitation that lets a member set their own password and log in for
+/// the first time — without an admin-generated temporary password. The raw token is e-mailed /
+/// copied to the member; only its SHA-256 hash is stored here (same scheme as RefreshToken).
+/// </summary>
+public class UserInvitation
+{
+    public int Id { get; set; }
+
+    public string UserId { get; set; } = null!;
+    public AppUser User { get; set; } = null!;
+
+    /// <summary>SHA-256 hex of the raw invitation token. Never store raw tokens.</summary>
+    public string TokenHash { get; set; } = null!;
+
+    public DateTime ExpiresAt { get; set; }
+    public DateTime CreatedAt { get; set; }
+
+    /// <summary>Id of the admin who generated the link.</summary>
+    public string CreatedBy { get; set; } = null!;
+
+    /// <summary>Set when the member consumes the link to set their password (single-use).</summary>
+    public DateTime? UsedAt { get; set; }
+
+    /// <summary>Set when superseded by a newer invitation for the same user (re-issue).</summary>
+    public DateTime? RevokedAt { get; set; }
+
+    // Computed helpers — NOT mapped to DB columns (ignored in OnModelCreating)
+    public bool IsExpired => DateTime.UtcNow >= ExpiresAt;
+    public bool IsUsed    => UsedAt.HasValue;
+    public bool IsRevoked => RevokedAt.HasValue;
+    public bool IsActive  => !IsUsed && !IsRevoked && !IsExpired;
+}

API/ROLAC.API/Migrations/20260624171411_AddUserInvitations.cs

@@ -0,0 +1,59 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ROLAC.API.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddUserInvitations : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "UserInvitations",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    UserId = table.Column<string>(type: "character varying(450)", maxLength: 450, nullable: false),
+                    TokenHash = table.Column<string>(type: "character varying(64)", maxLength: 64, nullable: false),
+                    ExpiresAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    CreatedBy = table.Column<string>(type: "character varying(450)", maxLength: 450, nullable: false),
+                    UsedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    RevokedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_UserInvitations", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_UserInvitations_AspNetUsers_UserId",
+                        column: x => x.UserId,
+                        principalTable: "AspNetUsers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_UserInvitations_TokenHash",
+                table: "UserInvitations",
+                column: "TokenHash",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_UserInvitations_UserId",
+                table: "UserInvitations",
+                column: "UserId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "UserInvitations");
+        }
+    }
+}

API/ROLAC.API/Migrations/AppDbContextModelSnapshot.cs

@@ -1803,6 +1803,51 @@ namespace ROLAC.API.Migrations
                     b.ToTable("SiteSettings");
                 });
 
+            modelBuilder.Entity("ROLAC.API.Entities.UserInvitation", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("CreatedBy")
+                        .IsRequired()
+                        .HasMaxLength(450)
+                        .HasColumnType("character varying(450)");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<DateTime?>("UsedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasMaxLength(450)
+                        .HasColumnType("character varying(450)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique();
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("UserInvitations");
+                });
+
             modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<string>", b =>
                 {
                     b.HasOne("ROLAC.API.Entities.AppRole", null)
@@ -2024,6 +2069,17 @@ namespace ROLAC.API.Migrations
                     b.Navigation("Role");
                 });
 
+            modelBuilder.Entity("ROLAC.API.Entities.UserInvitation", b =>
+                {
+                    b.HasOne("ROLAC.API.Entities.AppUser", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
             modelBuilder.Entity("ROLAC.API.Entities.AppUser", b =>
                 {
                     b.Navigation("RefreshTokens");

API/ROLAC.API/Program.cs

@@ -144,6 +144,7 @@ builder.Services.AddScoped<ITokenService,          TokenService>();
 builder.Services.AddScoped<IAuthService,           AuthService>();
 builder.Services.AddScoped<IMemberService,         MemberService>();
 builder.Services.AddScoped<IUserManagementService, UserManagementService>();
+builder.Services.AddScoped<IInvitationService,     InvitationService>();
 builder.Services.AddScoped<IGivingCategoryService, GivingCategoryService>();
 builder.Services.AddScoped<IGivingService, GivingService>();
 builder.Services.AddScoped<IOfferingSessionService, OfferingSessionService>();

API/ROLAC.API/Services/AuthService.cs

@@ -60,6 +60,22 @@ public class AuthService : IAuthService
             throw new UnauthorizedAccessException("Account is inactive.");
         }
 
+        _audit.Write(
+            AuditActions.Login, AuditCategories.Security, LogLevelEnum.Information,
+            entityName: nameof(AppUser), entityId: user.Id,
+            summary: $"Login succeeded: {user.Email}",
+            userId: user.Id, userEmail: user.Email, ipAddress: ipAddress);
+
+        return await IssueSessionAsync(user, ipAddress, deviceInfo);
+    }
+
+    // -------------------------------------------------------------------------
+    // Issue session (shared by login and passwordless flows like invitations)
+    // -------------------------------------------------------------------------
+
+    public async Task<(LoginResponse Response, string RawRefreshToken)> IssueSessionAsync(
+        AppUser user, string? ipAddress = null, string? deviceInfo = null)
+    {
         var roles       = await _userManager.GetRolesAsync(user);
         var accessToken = _tokenService.GenerateAccessToken(user, roles);
         var rawRefresh  = _tokenService.GenerateRefreshToken();
@@ -79,12 +95,6 @@ public class AuthService : IAuthService
         await _userManager.UpdateAsync(user);
         await _db.SaveChangesAsync();
 
-        _audit.Write(
-            AuditActions.Login, AuditCategories.Security, LogLevelEnum.Information,
-            entityName: nameof(AppUser), entityId: user.Id,
-            summary: $"Login succeeded: {user.Email}",
-            userId: user.Id, userEmail: user.Email, ipAddress: ipAddress);
-
         return (await BuildResponseAsync(accessToken, user, roles), rawRefresh);
     }
 

API/ROLAC.API/Services/IAuthService.cs

@@ -25,6 +25,16 @@ public interface IAuthService
         string rawRefreshToken,
         string? ipAddress = null);
 
+    /// <summary>
+    /// Issues a fresh access token + refresh token for an already-verified user (no password
+    /// check). Stores the refresh token and returns the raw value for the caller to put in the
+    /// HttpOnly cookie. Used by passwordless flows such as accepting an invitation link.
+    /// </summary>
+    Task<(LoginResponse Response, string RawRefreshToken)> IssueSessionAsync(
+        AppUser user,
+        string? ipAddress  = null,
+        string? deviceInfo = null);
+
     /// <summary>
     /// Revokes the refresh token identified by its raw value.
     /// Silently succeeds if the token is not found.

API/ROLAC.API/Services/IInvitationService.cs

@@ -0,0 +1,28 @@
+using ROLAC.API.DTOs.Invitations;
+using ROLAC.API.Entities;
+
+namespace ROLAC.API.Services;
+
+public interface IInvitationService
+{
+    /// <summary>
+    /// Generates a single-use, 7-day invitation link for a member. Auto-creates the member's
+    /// login account (no password) when none exists, and revokes any prior unused invitation for
+    /// that account. Returns the raw token (shown once) and its expiry.
+    /// Throws <see cref="InvalidOperationException"/> when the member is missing or has no email.
+    /// </summary>
+    Task<CreateInvitationResult> CreateAsync(CreateInvitationRequest request);
+
+    /// <summary>Checks whether a raw token is still usable, without mutating it.</summary>
+    Task<ValidateInvitationResult> ValidateAsync(string rawToken);
+
+    /// <summary>
+    /// Consumes an invitation: validates the token, sets the account password (enforcing the
+    /// Identity policy), and marks the invitation used. Returns the account on success, or an
+    /// error message describing why it failed (invalid/expired/used token or a policy violation).
+    /// </summary>
+    Task<(AppUser? User, string? Error)> AcceptAsync(string rawToken, string newPassword);
+
+    /// <summary>E-mails an already-generated invitation link to the member via IEmailService.</summary>
+    Task SendEmailAsync(int memberId, string link);
+}

API/ROLAC.API/Services/InvitationService.cs

@@ -0,0 +1,237 @@
+using System.Net;
+using System.Security.Cryptography;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.EntityFrameworkCore;
+using ROLAC.API.Data;
+using ROLAC.API.DTOs.Invitations;
+using ROLAC.API.Entities;
+using ROLAC.API.Entities.Logging;
+using ROLAC.API.Services.Logging;
+using ROLAC.API.Services.Notifications;
+
+namespace ROLAC.API.Services;
+
+public class InvitationService : IInvitationService
+{
+    /// <summary>Lifetime of a freshly issued invitation link.</summary>
+    private const int InvitationLifetimeDays = 7;
+
+    private readonly UserManager<AppUser> _userManager;
+    private readonly AppDbContext         _db;
+    private readonly ITokenService        _tokenService;
+    private readonly IEmailService        _emailService;
+    private readonly IAuditLogger         _audit;
+    private readonly CurrentUserAccessor  _currentUser;
+
+    public InvitationService(
+        UserManager<AppUser> userManager,
+        AppDbContext         db,
+        ITokenService        tokenService,
+        IEmailService        emailService,
+        IAuditLogger         audit,
+        CurrentUserAccessor  currentUser)
+    {
+        _userManager  = userManager;
+        _db           = db;
+        _tokenService = tokenService;
+        _emailService = emailService;
+        _audit        = audit;
+        _currentUser  = currentUser;
+    }
+
+    // ── Create ───────────────────────────────────────────────────────────────
+
+    public async Task<CreateInvitationResult> CreateAsync(CreateInvitationRequest request)
+    {
+        var member = await _db.Members.FindAsync(request.MemberId)
+            ?? throw new InvalidOperationException($"Member {request.MemberId} does not exist.");
+
+        var email = (request.Email ?? member.Email)?.Trim();
+        if (string.IsNullOrWhiteSpace(email))
+            throw new InvalidOperationException(
+                "This member has no email address. Add an email before creating an invitation.");
+
+        var user = await _userManager.Users.FirstOrDefaultAsync(u => u.MemberId == request.MemberId);
+        if (user is null)
+            user = await CreateAccountAsync(member, email, request.Roles);
+
+        var now = DateTime.UtcNow;
+
+        // Re-issue: revoke any prior unused invitation so only one link is ever live.
+        var existing = await _db.UserInvitations
+            .Where(invitation => invitation.UserId == user.Id
+                              && invitation.UsedAt == null
+                              && invitation.RevokedAt == null)
+            .ToListAsync();
+        foreach (var invitation in existing)
+            invitation.RevokedAt = now;
+
+        var rawToken  = GenerateRawToken();
+        var expiresAt = now.AddDays(InvitationLifetimeDays);
+
+        _db.UserInvitations.Add(new UserInvitation
+        {
+            UserId    = user.Id,
+            TokenHash = _tokenService.HashToken(rawToken),
+            ExpiresAt = expiresAt,
+            CreatedAt = now,
+            CreatedBy = _currentUser.UserIdOrSystem,
+        });
+
+        await _db.SaveChangesAsync();
+
+        _audit.Write(
+            AuditActions.InvitationCreated, AuditCategories.Security, LogLevelEnum.Information,
+            entityName: nameof(AppUser), entityId: user.Id,
+            summary: $"Invitation link created for {user.Email}");
+
+        return new CreateInvitationResult { Token = rawToken, ExpiresAt = expiresAt };
+    }
+
+    /// <summary>Creates a passwordless login account linked to the member; mirrors UserManagementService.</summary>
+    private async Task<AppUser> CreateAccountAsync(Member member, string email, List<string>? roles)
+    {
+        if (await _userManager.FindByEmailAsync(email) is not null)
+            throw new InvalidOperationException($"Email '{email}' is already in use by another account.");
+
+        var user = new AppUser
+        {
+            UserName           = email,
+            Email              = email,
+            EmailConfirmed     = true,
+            MemberId           = member.Id,
+            LanguagePreference = member.LanguagePreference,
+            IsActive           = true,
+            CreatedAt          = DateTime.UtcNow,
+        };
+
+        // No-password overload: the member sets their own password via the invitation link.
+        var result = await _userManager.CreateAsync(user);
+        if (!result.Succeeded)
+            throw new InvalidOperationException(
+                string.Join("; ", result.Errors.Select(error => error.Description)));
+
+        var rolesToAssign = roles is { Count: > 0 } ? roles : new List<string> { "member" };
+        await _userManager.AddToRolesAsync(user, rolesToAssign);
+
+        return user;
+    }
+
+    // ── Validate ───────────────────────────────────────────────────────────────
+
+    public async Task<ValidateInvitationResult> ValidateAsync(string rawToken)
+    {
+        var invitation = await FindByRawTokenAsync(rawToken);
+        if (invitation is null || invitation.IsUsed || invitation.IsRevoked)
+            return new ValidateInvitationResult { Valid = false, Expired = false };
+        if (invitation.IsExpired)
+            return new ValidateInvitationResult { Valid = false, Expired = true };
+
+        var user = await _userManager.FindByIdAsync(invitation.UserId);
+        return new ValidateInvitationResult
+        {
+            Valid      = true,
+            Expired    = false,
+            Email      = user?.Email,
+            MemberName = await ResolveMemberNameAsync(user),
+        };
+    }
+
+    // ── Accept ───────────────────────────────────────────────────────────────
+
+    public async Task<(AppUser? User, string? Error)> AcceptAsync(string rawToken, string newPassword)
+    {
+        var invitation = await FindByRawTokenAsync(rawToken);
+        if (invitation is null || invitation.IsUsed || invitation.IsRevoked)
+            return (null, "This invitation link is invalid or has already been used.");
+        if (invitation.IsExpired)
+            return (null, "This invitation link has expired. Please ask for a new one.");
+
+        var user = await _userManager.FindByIdAsync(invitation.UserId);
+        if (user is null)
+            return (null, "The account for this invitation no longer exists.");
+
+        // Set the password — works whether or not one already exists, and enforces the policy.
+        var resetToken = await _userManager.GeneratePasswordResetTokenAsync(user);
+        var result     = await _userManager.ResetPasswordAsync(user, resetToken, newPassword);
+        if (!result.Succeeded)
+            return (null, string.Join(" ", result.Errors.Select(error => error.Description)));
+
+        invitation.UsedAt   = DateTime.UtcNow;
+        user.EmailConfirmed = true;
+        user.IsActive       = true;
+        await _userManager.UpdateAsync(user);
+        await _db.SaveChangesAsync();
+
+        _audit.Write(
+            AuditActions.InvitationAccepted, AuditCategories.Security, LogLevelEnum.Information,
+            entityName: nameof(AppUser), entityId: user.Id,
+            summary: $"Invitation accepted — password set for {user.Email}",
+            userId: user.Id, userEmail: user.Email);
+
+        return (user, null);
+    }
+
+    // ── Send email ───────────────────────────────────────────────────────────
+
+    public async Task SendEmailAsync(int memberId, string link)
+    {
+        var member = await _db.Members.FindAsync(memberId)
+            ?? throw new InvalidOperationException($"Member {memberId} does not exist.");
+
+        var name    = WebUtility.HtmlEncode(member.NickName ?? member.FirstName_en);
+        var safeLink = WebUtility.HtmlEncode(link);
+        var subject = "Your River Of Life Christian Church account invitation";
+        var htmlBody =
+            $"<p>Hi {name},</p>" +
+            "<p>You've been invited to set up your account for the River Of Life Christian Church portal.</p>" +
+            $"<p>Click the link below to set your password and sign in. This link expires in {InvitationLifetimeDays} days and can only be used once.</p>" +
+            $"<p><a href=\"{safeLink}\">Set your password and sign in</a></p>" +
+            "<p>If the button doesn't work, copy and paste this address into your browser:</p>" +
+            $"<p>{safeLink}</p>";
+
+        var result = await _emailService.SendAsync(new EmailMessage(
+            MemberIds: new[] { memberId },
+            Addresses: Array.Empty<string>(),
+            Subject:   subject,
+            HtmlBody:  htmlBody));
+
+        if (result.SentCount == 0)
+            throw new InvalidOperationException(
+                result.Failures.Count > 0
+                    ? $"Failed to send email: {result.Failures[0].Error}"
+                    : "No email address on file for this member.");
+    }
+
+    // ── Helpers ───────────────────────────────────────────────────────────────
+
+    private Task<UserInvitation?> FindByRawTokenAsync(string rawToken)
+    {
+        if (string.IsNullOrWhiteSpace(rawToken))
+            return Task.FromResult<UserInvitation?>(null);
+
+        var hash = _tokenService.HashToken(rawToken);
+        return _db.UserInvitations.FirstOrDefaultAsync(invitation => invitation.TokenHash == hash);
+    }
+
+    private async Task<string?> ResolveMemberNameAsync(AppUser? user)
+    {
+        if (user?.MemberId is not int memberId)
+            return null;
+
+        return await _db.Members
+            .Where(member => member.Id == memberId)
+            .Select(member => (member.NickName ?? member.FirstName_en) + " " + member.LastName_en)
+            .FirstOrDefaultAsync();
+    }
+
+    /// <summary>32 cryptographically-random bytes as a URL-safe base64 string.</summary>
+    private static string GenerateRawToken()
+    {
+        var bytes = RandomNumberGenerator.GetBytes(32);
+        return Convert.ToBase64String(bytes)
+            .Replace('+', '-')
+            .Replace('/', '_')
+            .TrimEnd('=');
+    }
+}

APP/src/app/app.routes.ts

@@ -24,11 +24,15 @@ import { OfferingEntryMobilePageComponent } from './features/giving/pages/offeri
 import { SystemLogsPageComponent } from './features/logging/pages/system-logs-page/system-logs-page.component';
 import { AuditLogsPageComponent } from './features/logging/pages/audit-logs-page/audit-logs-page.component';
 import { AccountSettingsPageComponent } from './features/account/pages/account-settings-page/account-settings-page.component';
+import { AcceptInvitationComponent } from './features/accept-invitation/accept-invitation.component';
 
 export const routes: Routes = [
     // Public routes
     { path: 'login', component: LoginPage },
 
+    // Public first-login page — member sets their own password from a secret invitation link.
+    { path: 'accept-invitation', component: AcceptInvitationComponent },
+
     // Public Sunday meal attendance counter — no login required (volunteers on phones).
     { path: 'attendance', component: AttendanceCounterPageComponent },
 

APP/src/app/features/accept-invitation/accept-invitation.component.ts

@@ -0,0 +1,158 @@
+import { Component, OnInit } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { FormBuilder, FormGroup, Validators, ReactiveFormsModule } from '@angular/forms';
+import { ActivatedRoute, Router } from '@angular/router';
+import { InputsModule } from '@progress/kendo-angular-inputs';
+import { LabelModule } from '@progress/kendo-angular-label';
+import { ButtonsModule } from '@progress/kendo-angular-buttons';
+import { IndicatorsModule } from '@progress/kendo-angular-indicators';
+import { AuthService } from '../../shared/services/auth.service';
+import {
+  passwordStrengthValidator,
+  passwordMatchValidator,
+} from '../account/validators/password.validators';
+
+type Step = 'loading' | 'invalid' | 'form';
+
+@Component({
+  selector: 'app-accept-invitation',
+  standalone: true,
+  imports: [
+    CommonModule, ReactiveFormsModule,
+    InputsModule, LabelModule, ButtonsModule, IndicatorsModule,
+  ],
+  template: `
+<div class="min-h-screen flex items-center justify-center p-4">
+  <div class="w-full max-w-md rounded-lg border border-gray-200 bg-white p-6 shadow-sm">
+
+    <h1 class="text-xl font-semibold mb-1">River Of Life Christian Church</h1>
+
+    <!-- Validating the link -->
+    <ng-container *ngIf="step === 'loading'">
+      <div class="text-center py-6">
+        <kendo-loader></kendo-loader>
+        <p class="mt-2 text-gray-600">Checking your invitation…</p>
+      </div>
+    </ng-container>
+
+    <!-- Invalid / expired link -->
+    <ng-container *ngIf="step === 'invalid'">
+      <p class="text-base font-medium mb-2">This invitation can't be used</p>
+      <p class="text-gray-600 mb-4">{{ invalidMessage }}</p>
+      <button kendoButton themeColor="primary" (click)="goToLogin()">Go to sign in</button>
+    </ng-container>
+
+    <!-- Set password form -->
+    <ng-container *ngIf="step === 'form'">
+      <p class="text-gray-600 mb-4">
+        Welcome<span *ngIf="memberName">, <strong>{{ memberName }}</strong></span>. Set a password to
+        finish creating your account and sign in.
+      </p>
+
+      <form [formGroup]="form" class="k-form k-form-vertical" (ngSubmit)="onSubmit()">
+        <div class="grid grid-cols-1 gap-y-3">
+
+          <kendo-formfield>
+            <kendo-label text="New Password *"></kendo-label>
+            <kendo-textbox formControlName="newPassword" type="password" [clearButton]="false"></kendo-textbox>
+            <kendo-formerror *ngIf="form.get('newPassword')?.errors?.['required']">Required.</kendo-formerror>
+            <kendo-formerror *ngIf="form.get('newPassword')?.errors?.['passwordStrength']">
+              Must be at least 8 characters with an uppercase letter, a lowercase letter,
+              a digit, and a special character.
+            </kendo-formerror>
+          </kendo-formfield>
+
+          <kendo-formfield>
+            <kendo-label text="Confirm Password *"></kendo-label>
+            <kendo-textbox formControlName="confirmPassword" type="password" [clearButton]="false"></kendo-textbox>
+            <kendo-formerror *ngIf="form.get('confirmPassword')?.errors?.['required']">Required.</kendo-formerror>
+            <kendo-formerror *ngIf="form.errors?.['mismatch'] && form.get('confirmPassword')?.touched">
+              Passwords do not match.
+            </kendo-formerror>
+          </kendo-formfield>
+
+          <p *ngIf="errorMessage" class="k-color-error">{{ errorMessage }}</p>
+
+          <div class="mt-2">
+            <button kendoButton themeColor="primary" type="submit" [disabled]="form.invalid || submitting">
+              <span *ngIf="submitting">…</span>
+              Set password &amp; sign in
+            </button>
+          </div>
+
+        </div>
+      </form>
+    </ng-container>
+
+  </div>
+</div>
+  `,
+})
+export class AcceptInvitationComponent implements OnInit {
+  step: Step = 'loading';
+  form: FormGroup;
+  submitting = false;
+  memberName: string | null = null;
+  invalidMessage = 'This invitation link is invalid or has already been used.';
+  errorMessage = '';
+
+  private token = '';
+
+  constructor(
+    private fb: FormBuilder,
+    private auth: AuthService,
+    private route: ActivatedRoute,
+    private router: Router,
+  ) {
+    this.form = this.fb.group(
+      {
+        newPassword:     ['', [Validators.required, passwordStrengthValidator()]],
+        confirmPassword: ['', [Validators.required]],
+      },
+      { validators: passwordMatchValidator() },
+    );
+  }
+
+  ngOnInit(): void {
+    this.token = this.route.snapshot.queryParamMap.get('token') ?? '';
+    if (!this.token) {
+      this.step = 'invalid';
+      return;
+    }
+
+    this.auth.validateInvitation(this.token).subscribe({
+      next: (result) => {
+        if (result.valid) {
+          this.memberName = result.memberName ?? null;
+          this.step = 'form';
+        } else {
+          this.invalidMessage = result.expired
+            ? 'This invitation link has expired. Please ask for a new one.'
+            : 'This invitation link is invalid or has already been used.';
+          this.step = 'invalid';
+        }
+      },
+      error: () => { this.step = 'invalid'; },
+    });
+  }
+
+  onSubmit(): void {
+    if (this.form.invalid) { this.form.markAllAsTouched(); return; }
+    this.submitting = true;
+    this.errorMessage = '';
+
+    this.auth.acceptInvitation(this.token, this.form.value.newPassword).subscribe({
+      next: () => {
+        this.router.navigate(['/user-portal/dashboard']);
+      },
+      error: (err) => {
+        this.errorMessage = err.error?.message ?? 'Could not set your password. The link may have expired.';
+        this.submitting = false;
+      },
+    });
+  }
+
+  goToLogin(): void {
+    this.router.navigate(['/login']);
+  }
+}

APP/src/app/features/members/components/invitation-dialog/invitation-dialog.component.html

@@ -0,0 +1,60 @@
+<kendo-dialog title="Invitation Link" (close)="onClose()" [width]="560" [maxWidth]="'95vw'" [maxHeight]="'90vh'">
+
+  <!-- Ask for an email when the member has none on file -->
+  <ng-container *ngIf="step === 'needEmail'">
+    <p class="k-mb-4">
+      Create a first-login invitation for <strong>{{ memberName }}</strong>.
+      This member has no email on file — enter one to use as their login.
+    </p>
+
+    <form [formGroup]="emailForm" (ngSubmit)="generate()" class="k-form k-form-vertical">
+      <kendo-formfield>
+        <kendo-label text="Login Email *"></kendo-label>
+        <kendo-textbox formControlName="email"></kendo-textbox>
+        <kendo-formerror *ngIf="emailForm.get('email')?.errors?.['required']">Email is required.</kendo-formerror>
+        <kendo-formerror *ngIf="emailForm.get('email')?.errors?.['email']">Invalid email address.</kendo-formerror>
+      </kendo-formfield>
+    </form>
+
+    <p *ngIf="errorMessage" class="k-color-error k-mt-3">{{ errorMessage }}</p>
+
+    <kendo-dialog-actions>
+      <button kendoButton (click)="onClose()">Cancel</button>
+      <button kendoButton themeColor="primary" (click)="generate()">Create Link</button>
+    </kendo-dialog-actions>
+  </ng-container>
+
+  <!-- Generating spinner -->
+  <ng-container *ngIf="step === 'generating'">
+    <div class="k-text-center k-p-4">
+      <kendo-loader></kendo-loader>
+      <p class="k-mt-2">Creating invitation link…</p>
+    </div>
+  </ng-container>
+
+  <!-- Ready — show link to copy / email -->
+  <ng-container *ngIf="step === 'ready'">
+    <p class="k-mb-3">
+      Send this link to <strong>{{ memberName }}</strong>. They'll set their own password and sign in.
+    </p>
+
+    <div class="k-d-flex k-gap-2 k-align-items-center k-mb-2">
+      <kendo-textbox [value]="link" [readonly]="true" style="flex: 1"></kendo-textbox>
+      <button kendoButton (click)="copyLink()">{{ copied ? 'Copied!' : 'Copy' }}</button>
+    </div>
+
+    <p class="k-font-size-sm k-mb-3">
+      Single use — expires {{ expiresAt | date:'medium' }}.
+    </p>
+
+    <button kendoButton themeColor="info" (click)="sendEmail()" [disabled]="isSending">
+      <span *ngIf="isSending">…</span>
+      Send via email
+    </button>
+
+    <kendo-dialog-actions>
+      <button kendoButton themeColor="primary" (click)="onClose()">Done</button>
+    </kendo-dialog-actions>
+  </ng-container>
+
+</kendo-dialog>

APP/src/app/features/members/components/invitation-dialog/invitation-dialog.component.ts

@@ -0,0 +1,106 @@
+import { Component, Input, Output, EventEmitter, OnInit } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { FormBuilder, FormGroup, Validators, ReactiveFormsModule } from '@angular/forms';
+import { DialogsModule } from '@progress/kendo-angular-dialog';
+import { InputsModule } from '@progress/kendo-angular-inputs';
+import { LabelModule } from '@progress/kendo-angular-label';
+import { ButtonsModule } from '@progress/kendo-angular-buttons';
+import { IndicatorsModule } from '@progress/kendo-angular-indicators';
+import { MemberListItemDto, memberDisplayName } from '../../models/member.model';
+import { InvitationApiService } from '../../services/invitation-api.service';
+import { ToastService } from '../../../../core/services/toast.service';
+
+type Step = 'needEmail' | 'generating' | 'ready';
+
+@Component({
+  selector: 'app-invitation-dialog',
+  standalone: true,
+  imports: [
+    CommonModule, ReactiveFormsModule, DialogsModule, InputsModule,
+    LabelModule, ButtonsModule, IndicatorsModule,
+  ],
+  templateUrl: './invitation-dialog.component.html',
+})
+export class InvitationDialogComponent implements OnInit {
+  @Input({ required: true }) member!: MemberListItemDto;
+  @Output() cancelled = new EventEmitter<void>();
+
+  step: Step = 'generating';
+  emailForm!: FormGroup;
+
+  link = '';
+  expiresAt: string | null = null;
+  copied = false;
+  isSending = false;
+  errorMessage = '';
+
+  get memberName(): string { return memberDisplayName(this.member); }
+
+  constructor(
+    private fb: FormBuilder,
+    private invitationApi: InvitationApiService,
+    private toast: ToastService,
+  ) {}
+
+  ngOnInit(): void {
+    this.emailForm = this.fb.group({
+      email: [this.member.email ?? '', [Validators.required, Validators.email]],
+    });
+
+    // Auto-generate when the member already has an email; otherwise ask for one first.
+    if (this.member.email) {
+      this.generate();
+    } else {
+      this.step = 'needEmail';
+    }
+  }
+
+  /** Generate (or re-issue) the link. Uses the form email when the member has none on file. */
+  generate(): void {
+    if (this.step === 'needEmail') {
+      if (this.emailForm.invalid) { this.emailForm.markAllAsTouched(); return; }
+    }
+
+    const email = this.member.email ? undefined : this.emailForm.value.email;
+    this.step = 'generating';
+    this.errorMessage = '';
+
+    this.invitationApi.create(this.member.id, email).subscribe({
+      next: (result) => {
+        this.link      = `${window.location.origin}/accept-invitation?token=${result.token}`;
+        this.expiresAt = result.expiresAt;
+        this.step      = 'ready';
+      },
+      error: (err) => {
+        this.errorMessage = err.error?.message ?? 'Failed to create the invitation link.';
+        // Fall back to the email step so the admin can supply/correct an address.
+        this.step = 'needEmail';
+      },
+    });
+  }
+
+  copyLink(): void {
+    navigator.clipboard.writeText(this.link).then(() => {
+      this.copied = true;
+      setTimeout(() => (this.copied = false), 2000);
+    });
+  }
+
+  sendEmail(): void {
+    this.isSending = true;
+    this.invitationApi.sendEmail(this.member.id, this.link).subscribe({
+      next: () => {
+        this.toast.success(`Invitation emailed to ${this.memberName}.`);
+        this.isSending = false;
+      },
+      error: (err) => {
+        this.toast.error(err.error?.message ?? 'Failed to send the email.');
+        this.isSending = false;
+      },
+    });
+  }
+
+  onClose(): void {
+    this.cancelled.emit();
+  }
+}

APP/src/app/features/members/pages/members-page/members-page.component.html

@@ -63,13 +63,15 @@
       </ng-template>
     </kendo-grid-column>
 
-    <kendo-grid-column title="Actions" [width]="210">
+    <kendo-grid-column title="Actions" [width]="290">
       <ng-template kendoGridCellTemplate let-row>
         <div class="k-d-flex k-gap-2">
           <button kendoButton size="small" (click)="openEditDialog(row)">Edit</button>
           <button kendoButton size="small" themeColor="error" (click)="deleteMember(row)">Delete</button>
           <button *ngIf="!row.linkedUserId" kendoButton size="small" themeColor="info"
             (click)="openCreateUserDialog(row)">+ Account</button>
+          <button *appHasPermission="['Users', 'write']" kendoButton size="small" themeColor="warning"
+            (click)="openInviteDialog(row)">Invite</button>
         </div>
       </ng-template>
     </kendo-grid-column>
@@ -92,3 +94,10 @@
   (created)="onUserCreated()"
   (cancelled)="closeCreateUserDialog()">
 </app-create-user-dialog>
+
+<!-- Invitation Link Dialog -->
+<app-invitation-dialog
+  *ngIf="showInviteDialog && selectedMemberForInvite"
+  [member]="selectedMemberForInvite"
+  (cancelled)="closeInviteDialog()">
+</app-invitation-dialog>

APP/src/app/features/members/pages/members-page/members-page.component.ts

@@ -9,12 +9,14 @@ import { DropDownsModule } from '@progress/kendo-angular-dropdowns';
 import { MemberApiService } from '../../services/member-api.service';
 import { MemberFormDialogComponent } from '../../components/member-form-dialog/member-form-dialog.component';
 import { CreateUserDialogComponent } from '../../components/create-user-dialog/create-user-dialog.component';
+import { InvitationDialogComponent } from '../../components/invitation-dialog/invitation-dialog.component';
 import {
   MemberListItemDto, MemberDto, CreateMemberRequest,
   PagedResult, memberDisplayName
 } from '../../models/member.model';
 import { MEMBER_STATUS_OPTIONS } from '../../../../shared/i18n/option-lists';
 import { PageHeaderActionsDirective } from '../../../../shared/directives/page-header-actions.directive';
+import { HasPermissionDirective } from '../../../../core/directives/has-permission.directive';
 
 @Component({
   selector: 'app-members-page',
@@ -22,7 +24,8 @@ import { PageHeaderActionsDirective } from '../../../../shared/directives/page-h
   imports: [
     CommonModule, FormsModule, GridModule, InputsModule,
     ButtonsModule, IndicatorsModule, DropDownsModule,
-    MemberFormDialogComponent, CreateUserDialogComponent, PageHeaderActionsDirective,
+    MemberFormDialogComponent, CreateUserDialogComponent, InvitationDialogComponent,
+    PageHeaderActionsDirective, HasPermissionDirective,
   ],
   templateUrl: './members-page.component.html',
   styleUrls: ['./members-page.component.scss'],
@@ -46,8 +49,10 @@ export class MembersPageComponent implements OnInit {
   // Dialogs
   showMemberDialog = false;
   showCreateUserDialog = false;
+  showInviteDialog = false;
   editingMember: MemberDto | null = null;
   selectedMemberForUser: MemberListItemDto | null = null;
+  selectedMemberForInvite: MemberListItemDto | null = null;
 
   readonly memberDisplayName = memberDisplayName;
 
@@ -139,4 +144,18 @@ export class MembersPageComponent implements OnInit {
     this.closeCreateUserDialog();
     this.loadData();
   }
+
+  // ── Invitation Link ─────────────────────────────────────────────────────────
+
+  openInviteDialog(member: MemberListItemDto): void {
+    this.selectedMemberForInvite = member;
+    this.showInviteDialog        = true;
+  }
+
+  closeInviteDialog(): void {
+    this.showInviteDialog        = false;
+    this.selectedMemberForInvite = null;
+    // An invitation may have just created an account, so refresh the grid.
+    this.loadData();
+  }
 }

APP/src/app/features/members/services/invitation-api.service.ts

@@ -0,0 +1,30 @@
+import { Injectable } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { Observable } from 'rxjs';
+import { ApiConfigService } from '../../../core/services/api-config.service';
+
+export interface CreateInvitationResult {
+  /** Raw, single-use token — returned once; build the link from it client-side. */
+  token: string;
+  /** ISO timestamp when the link stops working. */
+  expiresAt: string;
+}
+
+@Injectable({ providedIn: 'root' })
+export class InvitationApiService {
+  private readonly endpoint: string;
+
+  constructor(private http: HttpClient, apiConfig: ApiConfigService) {
+    this.endpoint = apiConfig.getApiUrl('invitations');
+  }
+
+  /** Generate (or re-issue) a first-login invitation link for a member. */
+  create(memberId: number, email?: string): Observable<CreateInvitationResult> {
+    return this.http.post<CreateInvitationResult>(this.endpoint, { memberId, email });
+  }
+
+  /** E-mail an already-generated link to the member. */
+  sendEmail(memberId: number, link: string): Observable<void> {
+    return this.http.post<void>(`${this.endpoint}/send`, { memberId, link });
+  }
+}

APP/src/app/shared/services/auth.service.ts

@@ -64,6 +64,14 @@ export interface LoginResult {
     message?: string;
 }
 
+/** Matches the C# ValidateInvitationResult DTO. */
+export interface ValidateInvitationResult {
+    valid: boolean;
+    expired: boolean;
+    memberName?: string;
+    email?: string;
+}
+
 export interface TokenVerificationResult {
     isValid: boolean;
     /** Constructed from JWT claims when using secret-link login. */
@@ -177,6 +185,36 @@ export class AuthService {
         );
     }
 
+    /**
+     * Checks whether an invitation token is still usable (anonymous). Used by the
+     * public "set your password" page to decide what to show before the member types.
+     */
+    validateInvitation(token: string): Observable<ValidateInvitationResult> {
+        return this.http.get<ValidateInvitationResult>(
+            `${this.apiConfig.authUrl}/invitation/validate`,
+            { params: { token } }
+        );
+    }
+
+    /**
+     * Consumes an invitation: sets the password and logs the member in. On success the
+     * server returns a normal login payload, so we store the access token + user (and the
+     * refresh cookie is set server-side) exactly like login(). Errors propagate to the caller.
+     */
+    acceptInvitation(token: string, newPassword: string): Observable<UserInfo> {
+        return this.http.post<ApiLoginResponse>(
+            `${this.apiConfig.authUrl}/accept-invitation`,
+            { token, newPassword },
+            { withCredentials: true }
+        ).pipe(
+            tap(response => {
+                this.accessToken$.next(response.accessToken);
+                this.currentUser$.next(response.user);
+            }),
+            map(response => response.user)
+        );
+    }
+
     /**
      * Clears in-memory auth state immediately, then fires a fire-and-forget
      * POST to revoke the server-side refresh token cookie.