feat: migrate imphnen-backend-hackathon into workspace as imphnen-hackathon crate

Consolidates the standalone hackathon backend (16 crates) into a single
imphnen-hackathon crate following the existing clean architecture patterns.
All endpoints are exposed under /v1/hackathon/ via the gateway.

Features migrated:
- Auth: Supabase-based signup/login/GitHub OAuth/password reset (own JWT)
- Users: profile management with team listing
- Teams: CRUD with city validation, deadline enforcement, invite system
- Invitations: team member invitations with accept/reject flow
- Join Requests: team join request workflow
- Chat: team messaging with author/leader delete permissions
- Submissions: project submission lifecycle (draft→pending→submitted)
- Storage: Supabase Storage file upload endpoints
- Certificates: public user certificate data endpoint
- Winners: public winners listing
- Admin: admin-only CRUD for all entities

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

imphnen-hackathon/src/teams/infrastructure/http/dto.rs

@@ -0,0 +1,140 @@
+use serde::{Deserialize, Serialize};
+use utoipa::ToSchema;
+use uuid::Uuid;
+use chrono::{DateTime, Utc};
+use crate::teams::domain::entity::*;
+
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+pub struct UserInfoResponse {
+    pub id: Uuid,
+    pub email: String,
+    pub fullname: String,
+    pub avatar: Option<String>,
+    pub phone_number: Option<String>,
+    pub location: Option<String>,
+    pub bio: Option<String>,
+    pub skills: Option<Vec<String>>,
+    pub is_active: Option<bool>,
+}
+
+impl From<TeamUserInfo> for UserInfoResponse {
+    fn from(u: TeamUserInfo) -> Self {
+        Self { id: u.id, email: u.email, fullname: u.fullname, avatar: u.avatar,
+               phone_number: u.phone_number, location: u.location, bio: u.bio,
+               skills: u.skills, is_active: u.is_active }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+pub struct TeamMemberResponse {
+    pub id: Uuid,
+    pub team_id: Uuid,
+    pub user_id: Uuid,
+    pub user: UserInfoResponse,
+    pub role: String,
+    pub status: String,
+    pub joined_at: Option<DateTime<Utc>>,
+}
+
+impl From<TeamMemberEntity> for TeamMemberResponse {
+    fn from(m: TeamMemberEntity) -> Self {
+        Self { id: m.id, team_id: m.team_id, user_id: m.user_id,
+               user: UserInfoResponse::from(m.user), role: m.role, status: m.status, joined_at: m.joined_at }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+pub struct TeamResponse {
+    pub id: Uuid,
+    pub name: String,
+    pub description: Option<String>,
+    pub city: String,
+    pub visibility: String,
+    pub logo: Option<String>,
+    pub banner: Option<String>,
+    pub leader_id: Uuid,
+    pub leader: Option<UserInfoResponse>,
+    pub members: Option<Vec<TeamMemberResponse>>,
+    pub member_count: Option<i64>,
+    pub has_submission: Option<bool>,
+    pub created_at: Option<DateTime<Utc>>,
+    pub updated_at: Option<DateTime<Utc>>,
+}
+
+impl From<TeamWithDetails> for TeamResponse {
+    fn from(t: TeamWithDetails) -> Self {
+        Self {
+            id: t.id, name: t.name, description: t.description, city: t.city,
+            visibility: t.visibility, logo: t.logo, banner: t.banner, leader_id: t.leader_id,
+            leader: t.leader.map(UserInfoResponse::from),
+            members: t.members.map(|ms| ms.into_iter().map(TeamMemberResponse::from).collect()),
+            member_count: t.member_count, has_submission: t.has_submission,
+            created_at: t.created_at, updated_at: t.updated_at,
+        }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+pub struct CreateTeamRequest {
+    pub name: String,
+    pub description: Option<String>,
+    pub city: String,
+    pub visibility: String,
+    pub logo: Option<String>,
+    pub banner: Option<String>,
+}
+
+impl From<CreateTeamRequest> for CreateTeamInput {
+    fn from(r: CreateTeamRequest) -> Self {
+        Self { name: r.name, description: r.description, city: r.city,
+               visibility: r.visibility, logo: r.logo, banner: r.banner }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+pub struct UpdateTeamRequest {
+    pub name: Option<String>,
+    pub description: Option<String>,
+    pub city: Option<String>,
+    pub visibility: Option<String>,
+    pub logo: Option<String>,
+    pub banner: Option<String>,
+}
+
+impl From<UpdateTeamRequest> for UpdateTeamInput {
+    fn from(r: UpdateTeamRequest) -> Self {
+        Self { name: r.name, description: r.description, city: r.city,
+               visibility: r.visibility, logo: r.logo, banner: r.banner }
+    }
+}
+
+#[derive(Debug, Deserialize, ToSchema)]
+pub struct BrowseTeamsQuery {
+    pub search: Option<String>,
+    pub city: Option<String>,
+    pub min_members: Option<i64>,
+    pub max_members: Option<i64>,
+    pub has_submission: Option<bool>,
+    #[serde(default = "default_page")]
+    pub page: i64,
+    #[serde(default = "default_per_page")]
+    pub per_page: i64,
+}
+
+fn default_page() -> i64 { 1 }
+fn default_per_page() -> i64 { 10 }
+
+impl From<BrowseTeamsQuery> for BrowseTeamsInput {
+    fn from(q: BrowseTeamsQuery) -> Self {
+        Self { search: q.search, city: q.city, min_members: q.min_members, max_members: q.max_members,
+               has_submission: q.has_submission, page: q.page, per_page: q.per_page }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+pub struct TeamListResponse {
+    pub data: Vec<TeamResponse>,
+    pub total: i64,
+    pub page: i64,
+    pub per_page: i64,
+}