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/handlers.rs

@@ -0,0 +1,82 @@
+use axum::{Extension, Json, extract::{Path, Query}, response::IntoResponse};
+use std::sync::Arc;
+use uuid::Uuid;
+use imphnen_utils::{errors::AppError, response_format::{ApiSuccess, ApiMessage}};
+use crate::middleware::hackathon_auth::HackathonAuthUser;
+use crate::teams::domain::service::TeamService;
+use super::dto::*;
+
+pub async fn create_team_handler(
+    Extension(service): Extension<Arc<dyn TeamService>>,
+    Extension(auth): Extension<HackathonAuthUser>,
+    Json(body): Json<CreateTeamRequest>,
+) -> Result<axum::response::Response, AppError> {
+    let team = service.create_team(auth.user_id, body.into()).await?;
+    Ok(ApiSuccess(TeamResponse::from(team)).into_response())
+}
+
+pub async fn get_team_handler(
+    Extension(service): Extension<Arc<dyn TeamService>>,
+    Path(team_id): Path<Uuid>,
+) -> Result<axum::response::Response, AppError> {
+    let team = service.get_team_by_id(team_id).await?;
+    Ok(ApiSuccess(TeamResponse::from(team)).into_response())
+}
+
+pub async fn browse_teams_handler(
+    Extension(service): Extension<Arc<dyn TeamService>>,
+    Query(query): Query<BrowseTeamsQuery>,
+) -> Result<axum::response::Response, AppError> {
+    let result = service.browse_teams(query.into()).await?;
+    Ok(ApiSuccess(TeamListResponse {
+        data: result.teams.into_iter().map(TeamResponse::from).collect(),
+        total: result.total,
+        page: result.page,
+        per_page: result.per_page,
+    }).into_response())
+}
+
+pub async fn get_my_teams_handler(
+    Extension(service): Extension<Arc<dyn TeamService>>,
+    Extension(auth): Extension<HackathonAuthUser>,
+) -> Result<axum::response::Response, AppError> {
+    let teams = service.get_user_teams(auth.user_id).await?;
+    Ok(ApiSuccess(teams.into_iter().map(TeamResponse::from).collect::<Vec<_>>()).into_response())
+}
+
+pub async fn update_team_handler(
+    Extension(service): Extension<Arc<dyn TeamService>>,
+    Extension(auth): Extension<HackathonAuthUser>,
+    Path(team_id): Path<Uuid>,
+    Json(body): Json<UpdateTeamRequest>,
+) -> Result<axum::response::Response, AppError> {
+    let team = service.update_team(team_id, auth.user_id, body.into()).await?;
+    Ok(ApiSuccess(TeamResponse::from(team)).into_response())
+}
+
+pub async fn delete_team_handler(
+    Extension(service): Extension<Arc<dyn TeamService>>,
+    Extension(auth): Extension<HackathonAuthUser>,
+    Path(team_id): Path<Uuid>,
+) -> Result<axum::response::Response, AppError> {
+    service.delete_team(team_id, auth.user_id).await?;
+    Ok(ApiMessage::ok("Team deleted successfully").into_response())
+}
+
+pub async fn leave_team_handler(
+    Extension(service): Extension<Arc<dyn TeamService>>,
+    Extension(auth): Extension<HackathonAuthUser>,
+    Path(team_id): Path<Uuid>,
+) -> Result<axum::response::Response, AppError> {
+    service.leave_team(team_id, auth.user_id).await?;
+    Ok(ApiMessage::ok("Left team successfully").into_response())
+}
+
+pub async fn remove_member_handler(
+    Extension(service): Extension<Arc<dyn TeamService>>,
+    Extension(auth): Extension<HackathonAuthUser>,
+    Path((team_id, member_id)): Path<(Uuid, Uuid)>,
+) -> Result<axum::response::Response, AppError> {
+    service.remove_team_member(team_id, auth.user_id, member_id).await?;
+    Ok(ApiMessage::ok("Member removed successfully").into_response())
+}