feat: set timezone space level

internal/app/app.go

@@ -87,8 +87,8 @@ func New(cfg *config.Config) (*App, error) {
 	inviteService := service.NewInviteService(invitationRepository, spaceRepository, userRepository, emailService)
 	moneyAccountService := service.NewMoneyAccountService(moneyAccountRepository)
 	paymentMethodService := service.NewPaymentMethodService(paymentMethodRepository)
-	recurringExpenseService := service.NewRecurringExpenseService(recurringExpenseRepository, expenseRepository, profileRepository)
-	recurringDepositService := service.NewRecurringDepositService(recurringDepositRepository, moneyAccountRepository, expenseService, profileRepository)
+	recurringExpenseService := service.NewRecurringExpenseService(recurringExpenseRepository, expenseRepository, profileRepository, spaceRepository)
+	recurringDepositService := service.NewRecurringDepositService(recurringDepositRepository, moneyAccountRepository, expenseService, profileRepository, spaceRepository)
 	budgetService := service.NewBudgetService(budgetRepository)
 	reportService := service.NewReportService(expenseRepository)
 

internal/db/migrations/00016_add_timezone_to_spaces.sql

@@ -0,0 +1,5 @@
+-- +goose Up
+ALTER TABLE spaces ADD COLUMN timezone TEXT;
+
+-- +goose Down
+ALTER TABLE spaces DROP COLUMN IF EXISTS timezone;

internal/handler/settings_test.go

@@ -22,7 +22,8 @@ func newTestSettingsHandler(dbi testutil.DBInfo) (*settingsHandler, *service.Aut
 	emailSvc := service.NewEmailService(nil, "test@example.com", "http://localhost:9999", "Budgit Test", false)
 	authSvc := service.NewAuthService(emailSvc, userRepo, profileRepo, tokenRepo, spaceSvc, cfg.JWTSecret, cfg.JWTExpiry, cfg.TokenMagicLinkExpiry, false)
 	userSvc := service.NewUserService(userRepo)
-	return NewSettingsHandler(authSvc, userSvc), authSvc
+	profileSvc := service.NewProfileService(profileRepo)
+	return NewSettingsHandler(authSvc, userSvc, profileSvc), authSvc
 }
 
 func TestSettingsHandler_SettingsPage(t *testing.T) {

internal/handler/space.go

@@ -1177,6 +1177,46 @@ func (h *SpaceHandler) UpdateSpaceName(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusOK)
 }
 
+func (h *SpaceHandler) UpdateSpaceTimezone(w http.ResponseWriter, r *http.Request) {
+	spaceID := r.PathValue("spaceID")
+	user := ctxkeys.User(r.Context())
+
+	space, err := h.spaceService.GetSpace(spaceID)
+	if err != nil {
+		http.Error(w, "Space not found", http.StatusNotFound)
+		return
+	}
+
+	if space.OwnerID != user.ID {
+		http.Error(w, "Forbidden", http.StatusForbidden)
+		return
+	}
+
+	if err := r.ParseForm(); err != nil {
+		ui.RenderError(w, r, "Bad Request", http.StatusUnprocessableEntity)
+		return
+	}
+
+	tz := r.FormValue("timezone")
+	if tz == "" {
+		ui.RenderError(w, r, "Timezone is required", http.StatusUnprocessableEntity)
+		return
+	}
+
+	if err := h.spaceService.UpdateSpaceTimezone(spaceID, tz); err != nil {
+		if err == service.ErrInvalidTimezone {
+			ui.RenderError(w, r, "Invalid timezone", http.StatusUnprocessableEntity)
+			return
+		}
+		slog.Error("failed to update space timezone", "error", err, "space_id", spaceID)
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("HX-Refresh", "true")
+	w.WriteHeader(http.StatusOK)
+}
+
 func (h *SpaceHandler) RemoveMember(w http.ResponseWriter, r *http.Request) {
 	spaceID := r.PathValue("spaceID")
 	userID := r.PathValue("userID")

internal/handler/space_test.go

@@ -19,6 +19,7 @@ func newTestSpaceHandler(t *testing.T, dbi testutil.DBInfo) *SpaceHandler {
 	listRepo := repository.NewShoppingListRepository(dbi.DB)
 	itemRepo := repository.NewListItemRepository(dbi.DB)
 	expenseRepo := repository.NewExpenseRepository(dbi.DB)
+	profileRepo := repository.NewProfileRepository(dbi.DB)
 	inviteRepo := repository.NewInvitationRepository(dbi.DB)
 	accountRepo := repository.NewMoneyAccountRepository(dbi.DB)
 	methodRepo := repository.NewPaymentMethodRepository(dbi.DB)
@@ -36,8 +37,8 @@ func newTestSpaceHandler(t *testing.T, dbi testutil.DBInfo) *SpaceHandler {
 		service.NewInviteService(inviteRepo, spaceRepo, userRepo, emailSvc),
 		service.NewMoneyAccountService(accountRepo),
 		service.NewPaymentMethodService(methodRepo),
-		service.NewRecurringExpenseService(recurringRepo, expenseRepo),
-		service.NewRecurringDepositService(recurringDepositRepo, accountRepo, expenseSvc),
+		service.NewRecurringExpenseService(recurringRepo, expenseRepo, profileRepo, spaceRepo),
+		service.NewRecurringDepositService(recurringDepositRepo, accountRepo, expenseSvc, profileRepo, spaceRepo),
 		service.NewBudgetService(budgetRepo),
 		service.NewReportService(expenseRepo),
 	)

internal/model/space.go

@@ -13,10 +13,24 @@ type Space struct {
 	ID        string    `db:"id"`
 	Name      string    `db:"name"`
 	OwnerID   string    `db:"owner_id"`
+	Timezone  *string   `db:"timezone"`
 	CreatedAt time.Time `db:"created_at"`
 	UpdatedAt time.Time `db:"updated_at"`
 }
 
+// Location returns the *time.Location for this space's timezone.
+// Returns nil if timezone is not set, so callers can distinguish "not set" from "UTC".
+func (s *Space) Location() *time.Location {
+	if s.Timezone == nil || *s.Timezone == "" {
+		return nil
+	}
+	loc, err := time.LoadLocation(*s.Timezone)
+	if err != nil {
+		return nil
+	}
+	return loc
+}
+
 type SpaceMember struct {
 	SpaceID  string    `db:"space_id"`
 	UserID   string    `db:"user_id"`

internal/repository/space.go

@@ -22,6 +22,7 @@ type SpaceRepository interface {
 	IsMember(spaceID, userID string) (bool, error)
 	GetMembers(spaceID string) ([]*model.SpaceMemberWithProfile, error)
 	UpdateName(spaceID, name string) error
+	UpdateTimezone(spaceID, timezone string) error
 }
 
 type spaceRepository struct {
@@ -128,3 +129,9 @@ func (r *spaceRepository) UpdateName(spaceID, name string) error {
 	_, err := r.db.Exec(query, name, time.Now(), spaceID)
 	return err
 }
+
+func (r *spaceRepository) UpdateTimezone(spaceID, timezone string) error {
+	query := `UPDATE spaces SET timezone = $1, updated_at = $2 WHERE id = $3;`
+	_, err := r.db.Exec(query, timezone, time.Now(), spaceID)
+	return err
+}

internal/routes/routes.go

@@ -273,6 +273,10 @@ func SetupRoutes(a *app.App) http.Handler {
 	updateSpaceNameWithAuth := middleware.RequireAuth(updateSpaceNameHandler)
 	mux.Handle("PATCH /app/spaces/{spaceID}/settings/name", crudLimiter(updateSpaceNameWithAuth))
 
+	updateSpaceTimezoneHandler := middleware.RequireSpaceAccess(a.SpaceService)(space.UpdateSpaceTimezone)
+	updateSpaceTimezoneWithAuth := middleware.RequireAuth(updateSpaceTimezoneHandler)
+	mux.Handle("PATCH /app/spaces/{spaceID}/settings/timezone", crudLimiter(updateSpaceTimezoneWithAuth))
+
 	removeMemberHandler := middleware.RequireSpaceAccess(a.SpaceService)(space.RemoveMember)
 	removeMemberWithAuth := middleware.RequireAuth(removeMemberHandler)
 	mux.Handle("DELETE /app/spaces/{spaceID}/members/{userID}", crudLimiter(removeMemberWithAuth))

internal/service/recurring_deposit.go

@@ -37,14 +37,16 @@ type RecurringDepositService struct {
 	accountRepo    repository.MoneyAccountRepository
 	expenseService *ExpenseService
 	profileRepo    repository.ProfileRepository
+	spaceRepo      repository.SpaceRepository
 }
 
-func NewRecurringDepositService(recurringRepo repository.RecurringDepositRepository, accountRepo repository.MoneyAccountRepository, expenseService *ExpenseService, profileRepo repository.ProfileRepository) *RecurringDepositService {
+func NewRecurringDepositService(recurringRepo repository.RecurringDepositRepository, accountRepo repository.MoneyAccountRepository, expenseService *ExpenseService, profileRepo repository.ProfileRepository, spaceRepo repository.SpaceRepository) *RecurringDepositService {
 	return &RecurringDepositService{
 		recurringRepo:  recurringRepo,
 		accountRepo:    accountRepo,
 		expenseService: expenseService,
 		profileRepo:    profileRepo,
+		spaceRepo:      spaceRepo,
 	}
 }
 
@@ -165,8 +167,8 @@ func (s *RecurringDepositService) ProcessDueRecurrences(now time.Time) error {
 
 	tzCache := make(map[string]*time.Location)
 	for _, rd := range dues {
-		userNow := s.getUserNow(rd.CreatedBy, now, tzCache)
-		if err := s.processRecurrence(rd, userNow); err != nil {
+		localNow := s.getLocalNow(rd.SpaceID, rd.CreatedBy, now, tzCache)
+		if err := s.processRecurrence(rd, localNow); err != nil {
 			slog.Error("failed to process recurring deposit", "id", rd.ID, "error", err)
 		}
 	}
@@ -181,16 +183,32 @@ func (s *RecurringDepositService) ProcessDueRecurrencesForSpace(spaceID string,
 
 	tzCache := make(map[string]*time.Location)
 	for _, rd := range dues {
-		userNow := s.getUserNow(rd.CreatedBy, now, tzCache)
-		if err := s.processRecurrence(rd, userNow); err != nil {
+		localNow := s.getLocalNow(rd.SpaceID, rd.CreatedBy, now, tzCache)
+		if err := s.processRecurrence(rd, localNow); err != nil {
 			slog.Error("failed to process recurring deposit", "id", rd.ID, "error", err)
 		}
 	}
 	return nil
 }
 
-func (s *RecurringDepositService) getUserNow(userID string, now time.Time, cache map[string]*time.Location) time.Time {
-	if loc, ok := cache[userID]; ok {
+// getLocalNow resolves the effective timezone for a recurring deposit.
+// Resolution order: space timezone → user profile timezone → UTC.
+func (s *RecurringDepositService) getLocalNow(spaceID, userID string, now time.Time, cache map[string]*time.Location) time.Time {
+	spaceKey := "space:" + spaceID
+	if loc, ok := cache[spaceKey]; ok {
+		return now.In(loc)
+	}
+
+	space, err := s.spaceRepo.ByID(spaceID)
+	if err == nil && space != nil {
+		if loc := space.Location(); loc != nil {
+			cache[spaceKey] = loc
+			return now.In(loc)
+		}
+	}
+
+	userKey := "user:" + userID
+	if loc, ok := cache[userKey]; ok {
 		return now.In(loc)
 	}
 
@@ -199,7 +217,7 @@ func (s *RecurringDepositService) getUserNow(userID string, now time.Time, cache
 	if err == nil && profile != nil {
 		loc = profile.Location()
 	}
-	cache[userID] = loc
+	cache[userKey] = loc
 	return now.In(loc)
 }
 

internal/service/recurring_expense.go

@@ -39,13 +39,15 @@ type RecurringExpenseService struct {
 	recurringRepo repository.RecurringExpenseRepository
 	expenseRepo   repository.ExpenseRepository
 	profileRepo   repository.ProfileRepository
+	spaceRepo     repository.SpaceRepository
 }
 
-func NewRecurringExpenseService(recurringRepo repository.RecurringExpenseRepository, expenseRepo repository.ExpenseRepository, profileRepo repository.ProfileRepository) *RecurringExpenseService {
+func NewRecurringExpenseService(recurringRepo repository.RecurringExpenseRepository, expenseRepo repository.ExpenseRepository, profileRepo repository.ProfileRepository, spaceRepo repository.SpaceRepository) *RecurringExpenseService {
 	return &RecurringExpenseService{
 		recurringRepo: recurringRepo,
 		expenseRepo:   expenseRepo,
 		profileRepo:   profileRepo,
+		spaceRepo:     spaceRepo,
 	}
 }
 
@@ -180,8 +182,8 @@ func (s *RecurringExpenseService) ProcessDueRecurrences(now time.Time) error {
 
 	tzCache := make(map[string]*time.Location)
 	for _, re := range dues {
-		userNow := s.getUserNow(re.CreatedBy, now, tzCache)
-		if err := s.processRecurrence(re, userNow); err != nil {
+		localNow := s.getLocalNow(re.SpaceID, re.CreatedBy, now, tzCache)
+		if err := s.processRecurrence(re, localNow); err != nil {
 			slog.Error("failed to process recurring expense", "id", re.ID, "error", err)
 		}
 	}
@@ -196,8 +198,8 @@ func (s *RecurringExpenseService) ProcessDueRecurrencesForSpace(spaceID string,
 
 	tzCache := make(map[string]*time.Location)
 	for _, re := range dues {
-		userNow := s.getUserNow(re.CreatedBy, now, tzCache)
-		if err := s.processRecurrence(re, userNow); err != nil {
+		localNow := s.getLocalNow(re.SpaceID, re.CreatedBy, now, tzCache)
+		if err := s.processRecurrence(re, localNow); err != nil {
 			slog.Error("failed to process recurring expense", "id", re.ID, "error", err)
 		}
 	}
@@ -253,10 +255,24 @@ func (s *RecurringExpenseService) processRecurrence(re *model.RecurringExpense,
 	return s.recurringRepo.UpdateNextOccurrence(re.ID, re.NextOccurrence)
 }
 
-// getUserNow converts the server time to the user's local time based on their
-// profile timezone setting. Falls back to UTC if no timezone is set.
-func (s *RecurringExpenseService) getUserNow(userID string, now time.Time, cache map[string]*time.Location) time.Time {
-	if loc, ok := cache[userID]; ok {
+// getLocalNow resolves the effective timezone for a recurring expense.
+// Resolution order: space timezone → user profile timezone → UTC.
+func (s *RecurringExpenseService) getLocalNow(spaceID, userID string, now time.Time, cache map[string]*time.Location) time.Time {
+	spaceKey := "space:" + spaceID
+	if loc, ok := cache[spaceKey]; ok {
+		return now.In(loc)
+	}
+
+	space, err := s.spaceRepo.ByID(spaceID)
+	if err == nil && space != nil {
+		if loc := space.Location(); loc != nil {
+			cache[spaceKey] = loc
+			return now.In(loc)
+		}
+	}
+
+	userKey := "user:" + userID
+	if loc, ok := cache[userKey]; ok {
 		return now.In(loc)
 	}
 
@@ -265,7 +281,7 @@ func (s *RecurringExpenseService) getUserNow(userID string, now time.Time, cache
 	if err == nil && profile != nil {
 		loc = profile.Location()
 	}
-	cache[userID] = loc
+	cache[userKey] = loc
 	return now.In(loc)
 }
 

internal/service/space.go

@@ -110,3 +110,11 @@ func (s *SpaceService) UpdateSpaceName(spaceID, name string) error {
 	}
 	return s.spaceRepo.UpdateName(spaceID, name)
 }
+
+// UpdateSpaceTimezone updates the timezone of a space.
+func (s *SpaceService) UpdateSpaceTimezone(spaceID, timezone string) error {
+	if _, err := time.LoadLocation(timezone); err != nil {
+		return ErrInvalidTimezone
+	}
+	return s.spaceRepo.UpdateTimezone(spaceID, timezone)
+}

internal/ui/pages/app_space_settings.templ

@@ -3,13 +3,17 @@ package pages
 import (
 	"git.juancwu.dev/juancwu/budgit/internal/ctxkeys"
 	"git.juancwu.dev/juancwu/budgit/internal/model"
+	"git.juancwu.dev/juancwu/budgit/internal/timezone"
 	"git.juancwu.dev/juancwu/budgit/internal/ui/components/badge"
 	"git.juancwu.dev/juancwu/budgit/internal/ui/components/button"
 	"git.juancwu.dev/juancwu/budgit/internal/ui/components/card"
 	"git.juancwu.dev/juancwu/budgit/internal/ui/components/csrf"
 	"git.juancwu.dev/juancwu/budgit/internal/ui/components/dialog"
+	"git.juancwu.dev/juancwu/budgit/internal/ui/components/form"
 	"git.juancwu.dev/juancwu/budgit/internal/ui/components/icon"
 	"git.juancwu.dev/juancwu/budgit/internal/ui/components/input"
+	"git.juancwu.dev/juancwu/budgit/internal/ui/components/label"
+	"git.juancwu.dev/juancwu/budgit/internal/ui/components/selectbox"
 	"git.juancwu.dev/juancwu/budgit/internal/ui/layouts"
 )
 
@@ -55,6 +59,61 @@ templ SpaceSettingsPage(space *model.Space, members []*model.SpaceMemberWithProf
 					}
 				}
 			}
+			// Timezone Section
+			@card.Card() {
+				@card.Header() {
+					@card.Title() {
+						Timezone
+					}
+					@card.Description() {
+						if isOwner {
+							Set a timezone for this space. Recurring expenses and reports will use this timezone.
+						} else {
+							The timezone used for recurring expenses and reports in this space.
+						}
+					}
+				}
+				@card.Content() {
+					if isOwner {
+						<form
+							hx-patch={ "/app/spaces/" + space.ID + "/settings/timezone" }
+							hx-swap="none"
+							class="space-y-4"
+						>
+							@csrf.Token()
+							@form.Item() {
+								@label.Label(label.Props{
+									For:   "timezone",
+									Class: "block mb-2",
+								}) {
+									Timezone
+								}
+								@selectbox.SelectBox(selectbox.Props{ID: "space-timezone-select"}) {
+									@selectbox.Trigger(selectbox.TriggerProps{Name: "timezone"}) {
+										@selectbox.Value(selectbox.ValueProps{Placeholder: "Select timezone"})
+									}
+									@selectbox.Content(selectbox.ContentProps{SearchPlaceholder: "Search timezones..."}) {
+										for _, tz := range timezone.CommonTimezones() {
+											@selectbox.Item(selectbox.ItemProps{Value: tz.Value, Selected: space.Timezone != nil && tz.Value == *space.Timezone}) {
+												{ tz.Label }
+											}
+										}
+									}
+								}
+							}
+							@button.Submit() {
+								Save Timezone
+							}
+						</form>
+					} else {
+						if space.Timezone != nil && *space.Timezone != "" {
+							<p class="text-sm">{ *space.Timezone }</p>
+						} else {
+							<p class="text-sm text-muted-foreground">Not set (uses your timezone)</p>
+						}
+					}
+				}
+			}
 			// Members Section
 			@card.Card() {
 				@card.Header() {