Add organization and title fields with guest fallback validation

shatter-backend/docs/API_REFERENCE.md

@@ -463,6 +463,8 @@ Update a user's profile. Users can only update their own profile.
 | `bio`          | string | |
 | `profilePhoto` | string | URL |
 | `socialLinks`  | object | `{ linkedin?, github?, other? }` |
+| `organization` | string | Where the user works/studies |
+| `title`        | string | Job title or role |
 
 **Success Response (200):**
 
@@ -755,8 +757,10 @@ Join an event as a guest (no account required).
 | `socialLinks.linkedin` | string | No | LinkedIn URL |
 | `socialLinks.github` | string | No | GitHub URL |
 | `socialLinks.other` | string | No | Other URL |
+| `organization` | string | No* | Where the guest works/studies |
+| `title` | string | No | Job title or role |
 
-\* At least one contact method is required: either `email` or at least one non-empty field in `socialLinks`.
+\* At least one of the following is required: `email`, a non-empty field in `socialLinks`, or `organization`.
 
 **Success Response (200):**
 
@@ -779,14 +783,14 @@ Join an event as a guest (no account required).
 | Status | Error |
 |--------|-------|
 | 400    | `"Missing fields: guest name and eventId are required"` |
-| 400    | `"At least one contact method is required (email or a social link)"` |
+| 400    | `"At least one contact method (email or social link) or organization is required"` |
 | 400    | `"Invalid email format"` |
 | 400    | `"Event is full"` |
 | 404    | `"Event not found"` |
 | 409    | `"A user with this email already exists"` |
 
 **Special Behavior:**
-- Creates a guest User (`authProvider: 'guest'`) with the provided contact info (email and/or social links)
+- Creates a guest User (`authProvider: 'guest'`) with the provided contact info (email, social links, and/or organization)
 - If the display name is already taken in the event, a `#XXX` suffix is automatically appended (e.g., `John` becomes `John#472`). The response `participant.name` reflects the final display name, and the guest User's name is updated to match.
 - Returns a JWT so the guest can make authenticated requests
 - Guest can later upgrade to a full account via `PUT /api/users/:userId`
@@ -1259,7 +1263,8 @@ curl -X POST http://localhost:4000/api/events/<eventId>/join/user \
 curl -X POST http://localhost:4000/api/events/<eventId>/join/guest \
   -H "Content-Type: application/json" \
   -d '{
-    "name": "Guest User"
+    "name": "Guest User",
+    "email": "guest@example.com"
   }'
 ```
 

shatter-backend/docs/DATABASE_SCHEMA.md

@@ -63,6 +63,8 @@
 | `passwordHash`     | String            | No       | —          | `select: false` — excluded from queries by default |
 | `linkedinId`       | String            | No       | —          | Unique (sparse) |
 | `linkedinUrl`      | String            | No       | —          | Unique (sparse) |
+| `organization`     | String            | No       | —          | Trimmed |
+| `title`            | String            | No       | —          | Trimmed |
 | `bio`              | String            | No       | —          | Trimmed |
 | `profilePhoto`     | String            | No       | —          | |
 | `socialLinks`      | Object            | No       | —          | `{ linkedin?: String, github?: String, other?: String }` |

shatter-backend/src/controllers/event_controller.ts

@@ -272,10 +272,12 @@ export async function joinEventAsUser(req: Request, res: Response) {
  */
 export async function joinEventAsGuest(req: Request, res: Response) {
   try {
-    const { name, email, socialLinks } = req.body as {
+    const { name, email, socialLinks, organization, title } = req.body as {
       name?: string;
       email?: string;
       socialLinks?: { linkedin?: string; github?: string; other?: string };
+      organization?: string;
+      title?: string;
     };
     const { eventId } = req.params;
 
@@ -286,18 +288,19 @@ export async function joinEventAsGuest(req: Request, res: Response) {
       });
     }
 
-    // Require at least one contact method
+    // Require at least one contact method or organization
     const hasEmail = email && email.trim();
     const hasSocialLink = socialLinks && (
       socialLinks.linkedin?.trim() ||
       socialLinks.github?.trim() ||
       socialLinks.other?.trim()
     );
+    const hasOrganization = organization && organization.trim();
 
-    if (!hasEmail && !hasSocialLink) {
+    if (!hasEmail && !hasSocialLink && !hasOrganization) {
       return res.status(400).json({
         success: false,
-        msg: "At least one contact method is required (email or a social link)",
+        msg: "At least one contact method (email or social link) or organization is required",
       });
     }
 
@@ -325,6 +328,8 @@ export async function joinEventAsGuest(req: Request, res: Response) {
       authProvider: 'guest',
       ...(hasEmail && { email: email.toLowerCase().trim() }),
       ...(hasSocialLink && { socialLinks }),
+      ...(hasOrganization && { organization: organization.trim() }),
+      ...(title && title.trim() && { title: title.trim() }),
     });
 
     const userId = user._id as Types.ObjectId;

shatter-backend/src/controllers/user_controller.ts

@@ -114,13 +114,15 @@ export const updateUser = async (req: Request, res: Response) => {
       return res.status(403).json({ success: false, error: "You can only update your own profile" });
     }
 
-    const { name, email, password, bio, profilePhoto, socialLinks } = req.body as {
+    const { name, email, password, bio, profilePhoto, socialLinks, organization, title } = req.body as {
       name?: string;
       email?: string;
       password?: string;
       bio?: string;
       profilePhoto?: string;
       socialLinks?: { linkedin?: string; github?: string; other?: string };
+      organization?: string;
+      title?: string;
     };
 
     const updateFields: Record<string, any> = {};
@@ -161,6 +163,8 @@ export const updateUser = async (req: Request, res: Response) => {
     if (bio !== undefined) updateFields.bio = bio;
     if (profilePhoto !== undefined) updateFields.profilePhoto = profilePhoto;
     if (socialLinks !== undefined) updateFields.socialLinks = socialLinks;
+    if (organization !== undefined) updateFields.organization = organization;
+    if (title !== undefined) updateFields.title = title;
 
     if (Object.keys(updateFields).length === 0) {
       return res.status(400).json({ success: false, error: "No fields to update" });

shatter-backend/src/models/user_model.ts

@@ -12,6 +12,8 @@ export interface IUser {
   passwordHash?: string;
   linkedinId?: string;
   linkedinUrl?: string;
+  organization?: string;
+  title?: string;
   bio?: string;
   profilePhoto?: string;
   socialLinks?: {
@@ -65,6 +67,14 @@ const UserSchema = new Schema<IUser>(
       unique: true,
       sparse: true,
     },
+    organization: {
+      type: String,
+      trim: true,
+    },
+    title: {
+      type: String,
+      trim: true,
+    },
     bio: {
       type: String,
       trim: true,