diff --git a/backend/internal/handler/auth_oauth_pending_flow.go b/backend/internal/handler/auth_oauth_pending_flow.go
index b98d4d33..402a6cfc 100644
--- a/backend/internal/handler/auth_oauth_pending_flow.go
+++ b/backend/internal/handler/auth_oauth_pending_flow.go
@@ -644,15 +644,17 @@ func resolvePendingOAuthTargetUserID(ctx context.Context, client *dbent.Client,
 }
 
 func userNormalizedEmailPredicate(email string) predicate.User {
-	normalized := strings.TrimSpace(email)
+	normalized := strings.ToLower(strings.TrimSpace(email))
 	if normalized == "" {
 		return dbuser.EmailEQ(email)
 	}
 	return predicate.User(func(s *entsql.Selector) {
-		s.Where(entsql.ExprP(
-			fmt.Sprintf("LOWER(TRIM(%s)) = LOWER(TRIM(?))", s.C(dbuser.FieldEmail)),
-			normalized,
-		))
+		s.Where(entsql.P(func(b *entsql.Builder) {
+			b.WriteString("LOWER(TRIM(").
+				Ident(s.C(dbuser.FieldEmail)).
+				WriteString(")) = ").
+				Arg(normalized)
+		}))
 	})
 }
 
@@ -718,7 +720,16 @@ func ensurePendingOAuthIdentityForUser(ctx context.Context, tx *dbent.Tx, sessio
 	}
 	if identity != nil {
 		if identity.UserID != userID {
-			return nil, infraerrors.Conflict("AUTH_IDENTITY_OWNERSHIP_CONFLICT", "auth identity already belongs to another user")
+			activeOwner, err := findActiveUserByID(ctx, client, identity.UserID)
+			if err != nil {
+				return nil, err
+			}
+			if activeOwner != nil {
+				return nil, infraerrors.Conflict("AUTH_IDENTITY_OWNERSHIP_CONFLICT", "auth identity already belongs to another user")
+			}
+			return client.AuthIdentity.UpdateOneID(identity.ID).
+				SetUserID(userID).
+				Save(ctx)
 		}
 		return identity, nil
 	}
@@ -756,7 +767,7 @@ func ensurePendingWeChatOAuthIdentityForUser(ctx context.Context, tx *dbent.Tx,
 	if err != nil {
 		return nil, err
 	}
-	identity, hasCanonicalKey, err := chooseWeChatIdentityForUser(identityRecords, userID, providerKey)
+	identity, hasCanonicalKey, err := chooseWeChatIdentityForUser(ctx, client, identityRecords, userID, providerKey)
 	if err != nil {
 		return nil, err
 	}
@@ -773,7 +784,7 @@ func ensurePendingWeChatOAuthIdentityForUser(ctx context.Context, tx *dbent.Tx,
 		if err != nil {
 			return nil, err
 		}
-		legacyOpenIDIdentity, _, err = chooseWeChatIdentityForUser(legacyOpenIDRecords, userID, providerKey)
+		legacyOpenIDIdentity, _, err = chooseWeChatIdentityForUser(ctx, client, legacyOpenIDRecords, userID, providerKey)
 		if err != nil {
 			return nil, err
 		}
@@ -783,6 +794,9 @@ func ensurePendingWeChatOAuthIdentityForUser(ctx context.Context, tx *dbent.Tx,
 	case identity != nil:
 		update := client.AuthIdentity.UpdateOneID(identity.ID).
 			SetMetadata(mergeOAuthMetadata(identity.Metadata, metadata))
+		if identity.UserID != userID {
+			update = update.SetUserID(userID)
+		}
 		if !strings.EqualFold(strings.TrimSpace(identity.ProviderKey), providerKey) && !hasCanonicalKey {
 			update = update.SetProviderKey(providerKey)
 		}
@@ -838,7 +852,7 @@ func ensurePendingWeChatOAuthIdentityForUser(ctx context.Context, tx *dbent.Tx,
 	if err != nil {
 		return nil, err
 	}
-	channelRecord, hasCanonicalChannelKey, err := chooseWeChatChannelForUser(channelRecords, userID, providerKey)
+	channelRecord, hasCanonicalChannelKey, err := chooseWeChatChannelForUser(ctx, client, channelRecords, userID, providerKey)
 	if err != nil {
 		return nil, err
 	}
@@ -872,7 +886,7 @@ func ensurePendingWeChatOAuthIdentityForUser(ctx context.Context, tx *dbent.Tx,
 	return identity, nil
 }
 
-func chooseWeChatIdentityForUser(records []*dbent.AuthIdentity, userID int64, preferredProviderKey string) (*dbent.AuthIdentity, bool, error) {
+func chooseWeChatIdentityForUser(ctx context.Context, client *dbent.Client, records []*dbent.AuthIdentity, userID int64, preferredProviderKey string) (*dbent.AuthIdentity, bool, error) {
 	var preferred *dbent.AuthIdentity
 	var fallback *dbent.AuthIdentity
 	hasCanonicalKey := false
@@ -881,7 +895,13 @@ func chooseWeChatIdentityForUser(records []*dbent.AuthIdentity, userID int64, pr
 			continue
 		}
 		if record.UserID != userID {
-			return nil, false, infraerrors.Conflict("AUTH_IDENTITY_OWNERSHIP_CONFLICT", "auth identity already belongs to another user")
+			activeOwner, err := findActiveUserByID(ctx, client, record.UserID)
+			if err != nil {
+				return nil, false, err
+			}
+			if activeOwner != nil {
+				return nil, false, infraerrors.Conflict("AUTH_IDENTITY_OWNERSHIP_CONFLICT", "auth identity already belongs to another user")
+			}
 		}
 		if strings.EqualFold(strings.TrimSpace(record.ProviderKey), preferredProviderKey) {
 			hasCanonicalKey = true
@@ -900,7 +920,7 @@ func chooseWeChatIdentityForUser(records []*dbent.AuthIdentity, userID int64, pr
 	return fallback, hasCanonicalKey, nil
 }
 
-func chooseWeChatChannelForUser(records []*dbent.AuthIdentityChannel, userID int64, preferredProviderKey string) (*dbent.AuthIdentityChannel, bool, error) {
+func chooseWeChatChannelForUser(ctx context.Context, client *dbent.Client, records []*dbent.AuthIdentityChannel, userID int64, preferredProviderKey string) (*dbent.AuthIdentityChannel, bool, error) {
 	var preferred *dbent.AuthIdentityChannel
 	var fallback *dbent.AuthIdentityChannel
 	hasCanonicalKey := false
@@ -909,7 +929,13 @@ func chooseWeChatChannelForUser(records []*dbent.AuthIdentityChannel, userID int
 			continue
 		}
 		if record.Edges.Identity != nil && record.Edges.Identity.UserID != userID {
-			return nil, false, infraerrors.Conflict("AUTH_IDENTITY_CHANNEL_OWNERSHIP_CONFLICT", "auth identity channel already belongs to another user")
+			activeOwner, err := findActiveUserByID(ctx, client, record.Edges.Identity.UserID)
+			if err != nil {
+				return nil, false, err
+			}
+			if activeOwner != nil {
+				return nil, false, infraerrors.Conflict("AUTH_IDENTITY_CHANNEL_OWNERSHIP_CONFLICT", "auth identity channel already belongs to another user")
+			}
 		}
 		if strings.EqualFold(strings.TrimSpace(record.ProviderKey), preferredProviderKey) {
 			hasCanonicalKey = true
@@ -928,6 +954,20 @@ func chooseWeChatChannelForUser(records []*dbent.AuthIdentityChannel, userID int
 	return fallback, hasCanonicalKey, nil
 }
 
+func findActiveUserByID(ctx context.Context, client *dbent.Client, userID int64) (*dbent.User, error) {
+	if client == nil || userID <= 0 {
+		return nil, nil
+	}
+	userEntity, err := client.User.Get(ctx, userID)
+	if err != nil {
+		if dbent.IsNotFound(err) {
+			return nil, nil
+		}
+		return nil, infraerrors.InternalServer("AUTH_IDENTITY_USER_LOOKUP_FAILED", "failed to load auth identity user").WithCause(err)
+	}
+	return userEntity, nil
+}
+
 func channelRecordMetadata(channel *dbent.AuthIdentityChannel) map[string]any {
 	if channel == nil {
 		return map[string]any{}
@@ -1343,7 +1383,7 @@ func (h *AuthHandler) bindPendingOAuthLogin(c *gin.Context, provider string) {
 		return
 	}
 	if err := applyPendingOAuthBinding(c.Request.Context(), h.entClient(), h.authService, h.userService, session, decision, &user.ID, true, true); err != nil {
-		response.ErrorFrom(c, infraerrors.InternalServer("PENDING_AUTH_BIND_APPLY_FAILED", "failed to bind pending oauth identity").WithCause(err))
+		respondPendingOAuthBindingApplyError(c, err)
 		return
 	}
 
@@ -1363,6 +1403,14 @@ func (h *AuthHandler) bindPendingOAuthLogin(c *gin.Context, provider string) {
 	writeOAuthTokenPairResponse(c, tokenPair)
 }
 
+func respondPendingOAuthBindingApplyError(c *gin.Context, err error) {
+	if code := infraerrors.Code(err); code >= http.StatusBadRequest && code < http.StatusInternalServerError {
+		response.ErrorFrom(c, err)
+		return
+	}
+	response.ErrorFrom(c, infraerrors.InternalServer("PENDING_AUTH_BIND_APPLY_FAILED", "failed to bind pending oauth identity").WithCause(err))
+}
+
 func (h *AuthHandler) createPendingOAuthAccount(c *gin.Context, provider string) {
 	var req createPendingOAuthAccountRequest
 	if err := c.ShouldBindJSON(&req); err != nil {
@@ -1480,7 +1528,7 @@ func (h *AuthHandler) createPendingOAuthAccount(c *gin.Context, provider string)
 		if rollbackCreatedUser(err) {
 			return
 		}
-		response.ErrorFrom(c, infraerrors.InternalServer("PENDING_AUTH_BIND_APPLY_FAILED", "failed to bind pending oauth identity").WithCause(err))
+		respondPendingOAuthBindingApplyError(c, err)
 		return
 	}
 
@@ -1514,7 +1562,7 @@ func (h *AuthHandler) createPendingOAuthAccount(c *gin.Context, provider string)
 			if rollbackCreatedUser(err) {
 				return
 			}
-			response.ErrorFrom(c, infraerrors.InternalServer("PENDING_AUTH_BIND_APPLY_FAILED", "failed to bind pending oauth identity").WithCause(err))
+			respondPendingOAuthBindingApplyError(c, err)
 			return
 		}
 	}
diff --git a/backend/internal/handler/auth_oauth_pending_flow_test.go b/backend/internal/handler/auth_oauth_pending_flow_test.go
index a4a5c544..bf16b48d 100644
--- a/backend/internal/handler/auth_oauth_pending_flow_test.go
+++ b/backend/internal/handler/auth_oauth_pending_flow_test.go
@@ -1358,6 +1358,80 @@ func TestBindOIDCOAuthLoginRejectsInvalidPasswordWithoutConsumingSession(t *test
 	require.Nil(t, storedSession.ConsumedAt)
 }
 
+func TestBindOIDCOAuthLoginReclaimsIdentityOwnedBySoftDeletedUser(t *testing.T) {
+	handler, client := newOAuthPendingFlowTestHandler(t, false)
+	ctx := context.Background()
+
+	oldOwnerHash, err := handler.authService.HashPassword("old-secret")
+	require.NoError(t, err)
+	oldOwner, err := client.User.Create().
+		SetEmail("old-owner@example.com").
+		SetUsername("old-owner").
+		SetPasswordHash(oldOwnerHash).
+		SetRole(service.RoleUser).
+		SetStatus(service.StatusActive).
+		Save(ctx)
+	require.NoError(t, err)
+
+	identity, err := client.AuthIdentity.Create().
+		SetUserID(oldOwner.ID).
+		SetProviderType("oidc").
+		SetProviderKey("https://issuer.example").
+		SetProviderSubject("oidc-bind-soft-deleted-123").
+		SetMetadata(map[string]any{"username": "old-owner"}).
+		Save(ctx)
+	require.NoError(t, err)
+
+	_, err = client.User.Delete().Where(dbuser.IDEQ(oldOwner.ID)).Exec(ctx)
+	require.NoError(t, err)
+
+	newOwnerHash, err := handler.authService.HashPassword("secret-123")
+	require.NoError(t, err)
+	newOwner, err := client.User.Create().
+		SetEmail("owner@example.com").
+		SetUsername("owner-user").
+		SetPasswordHash(newOwnerHash).
+		SetRole(service.RoleUser).
+		SetStatus(service.StatusActive).
+		Save(ctx)
+	require.NoError(t, err)
+
+	session, err := client.PendingAuthSession.Create().
+		SetSessionToken("bind-login-soft-deleted-owner-session-token").
+		SetIntent("adopt_existing_user_by_email").
+		SetProviderType("oidc").
+		SetProviderKey("https://issuer.example").
+		SetProviderSubject("oidc-bind-soft-deleted-123").
+		SetTargetUserID(newOwner.ID).
+		SetResolvedEmail(newOwner.Email).
+		SetBrowserSessionKey("bind-login-soft-deleted-owner-browser-session-key").
+		SetUpstreamIdentityClaims(map[string]any{
+			"username":               "oidc_user",
+			"suggested_display_name": "Recovered OIDC User",
+		}).
+		SetRedirectTo("/profile").
+		SetExpiresAt(time.Now().UTC().Add(10 * time.Minute)).
+		Save(ctx)
+	require.NoError(t, err)
+
+	body := bytes.NewBufferString(`{"email":"owner@example.com","password":"secret-123","adopt_display_name":false,"adopt_avatar":false}`)
+	recorder := httptest.NewRecorder()
+	ginCtx, _ := gin.CreateTestContext(recorder)
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/auth/oauth/oidc/bind-login", body)
+	req.Header.Set("Content-Type", "application/json")
+	req.AddCookie(&http.Cookie{Name: oauthPendingSessionCookieName, Value: encodeCookieValue(session.SessionToken)})
+	req.AddCookie(&http.Cookie{Name: oauthPendingBrowserCookieName, Value: encodeCookieValue("bind-login-soft-deleted-owner-browser-session-key")})
+	ginCtx.Request = req
+
+	handler.BindOIDCOAuthLogin(ginCtx)
+
+	require.Equal(t, http.StatusOK, recorder.Code)
+
+	identity, err = client.AuthIdentity.Get(ctx, identity.ID)
+	require.NoError(t, err)
+	require.Equal(t, newOwner.ID, identity.UserID)
+}
+
 func TestBindOIDCOAuthLoginAppliesFirstBindGrantOnce(t *testing.T) {
 	defaultSubAssigner := &oauthPendingFlowDefaultSubAssignerStub{}
 	handler, client := newOAuthPendingFlowTestHandlerWithDependencies(t, oauthPendingFlowTestHandlerOptions{
diff --git a/backend/internal/repository/user_repo.go b/backend/internal/repository/user_repo.go
index b6f907aa..59eec952 100644
--- a/backend/internal/repository/user_repo.go
+++ b/backend/internal/repository/user_repo.go
@@ -12,7 +12,9 @@ import (
 	dbent "github.com/Wei-Shaw/sub2api/ent"
 	"github.com/Wei-Shaw/sub2api/ent/apikey"
 	"github.com/Wei-Shaw/sub2api/ent/authidentity"
+	"github.com/Wei-Shaw/sub2api/ent/authidentitychannel"
 	dbgroup "github.com/Wei-Shaw/sub2api/ent/group"
+	"github.com/Wei-Shaw/sub2api/ent/identityadoptiondecision"
 	"github.com/Wei-Shaw/sub2api/ent/predicate"
 	dbuser "github.com/Wei-Shaw/sub2api/ent/user"
 	"github.com/Wei-Shaw/sub2api/ent/userallowedgroup"
@@ -292,13 +294,57 @@ func normalizeEmailAuthIdentitySubject(email string) string {
 }
 
 func (r *userRepository) Delete(ctx context.Context, id int64) error {
-	affected, err := r.client.User.Delete().Where(dbuser.IDEQ(id)).Exec(ctx)
+	tx, err := r.client.Tx(ctx)
+	if err != nil && !errors.Is(err, dbent.ErrTxStarted) {
+		return translatePersistenceError(err, service.ErrUserNotFound, nil)
+	}
+
+	var txClient *dbent.Client
+	if err == nil {
+		defer func() { _ = tx.Rollback() }()
+		txClient = tx.Client()
+	} else {
+		txClient = r.client
+	}
+
+	identityIDs, err := txClient.AuthIdentity.Query().
+		Where(authidentity.UserIDEQ(id)).
+		IDs(ctx)
+	if err != nil {
+		return translatePersistenceError(err, service.ErrUserNotFound, nil)
+	}
+	if len(identityIDs) > 0 {
+		if _, err := txClient.IdentityAdoptionDecision.Update().
+			Where(identityadoptiondecision.IdentityIDIn(identityIDs...)).
+			ClearIdentityID().
+			Save(ctx); err != nil {
+			return translatePersistenceError(err, service.ErrUserNotFound, nil)
+		}
+		if _, err := txClient.AuthIdentityChannel.Delete().
+			Where(authidentitychannel.IdentityIDIn(identityIDs...)).
+			Exec(ctx); err != nil {
+			return translatePersistenceError(err, service.ErrUserNotFound, nil)
+		}
+		if _, err := txClient.AuthIdentity.Delete().
+			Where(authidentity.UserIDEQ(id)).
+			Exec(ctx); err != nil {
+			return translatePersistenceError(err, service.ErrUserNotFound, nil)
+		}
+	}
+
+	affected, err := txClient.User.Delete().Where(dbuser.IDEQ(id)).Exec(ctx)
 	if err != nil {
 		return translatePersistenceError(err, service.ErrUserNotFound, nil)
 	}
 	if affected == 0 {
 		return service.ErrUserNotFound
 	}
+
+	if tx != nil {
+		if err := tx.Commit(); err != nil {
+			return translatePersistenceError(err, service.ErrUserNotFound, nil)
+		}
+	}
 	return nil
 }
 
@@ -645,15 +691,17 @@ func (r *userRepository) ExistsByEmail(ctx context.Context, email string) (bool,
 }
 
 func userEmailLookupPredicate(email string) predicate.User {
-	normalized := strings.TrimSpace(email)
+	normalized := strings.ToLower(strings.TrimSpace(email))
 	if normalized == "" {
 		return dbuser.EmailEQ(email)
 	}
 	return predicate.User(func(s *entsql.Selector) {
-		s.Where(entsql.ExprP(
-			fmt.Sprintf("LOWER(TRIM(%s)) = LOWER(TRIM(?))", s.C(dbuser.FieldEmail)),
-			normalized,
-		))
+		s.Where(entsql.P(func(b *entsql.Builder) {
+			b.WriteString("LOWER(TRIM(").
+				Ident(s.C(dbuser.FieldEmail)).
+				WriteString(")) = ").
+				Arg(normalized)
+		}))
 	})
 }
 
diff --git a/backend/internal/repository/user_repo_integration_test.go b/backend/internal/repository/user_repo_integration_test.go
index 07fb0598..b1c6cfc0 100644
--- a/backend/internal/repository/user_repo_integration_test.go
+++ b/backend/internal/repository/user_repo_integration_test.go
@@ -8,6 +8,8 @@ import (
 	"time"
 
 	dbent "github.com/Wei-Shaw/sub2api/ent"
+	"github.com/Wei-Shaw/sub2api/ent/authidentity"
+	"github.com/Wei-Shaw/sub2api/ent/authidentitychannel"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 	"github.com/Wei-Shaw/sub2api/internal/service"
 	"github.com/stretchr/testify/suite"
@@ -124,11 +126,27 @@ func (s *UserRepoSuite) TestGetByEmail() {
 	s.Require().Equal(user.ID, got.ID)
 }
 
+func (s *UserRepoSuite) TestGetByEmail_NormalizesSpacingAndCaseOnPostgres() {
+	user := s.mustCreateUser(&service.User{Email: " Legacy@Example.com "})
+
+	got, err := s.repo.GetByEmail(s.ctx, "  legacy@example.com  ")
+	s.Require().NoError(err, "GetByEmail normalized lookup")
+	s.Require().Equal(user.ID, got.ID)
+}
+
 func (s *UserRepoSuite) TestGetByEmail_NotFound() {
 	_, err := s.repo.GetByEmail(s.ctx, "nonexistent@test.com")
 	s.Require().Error(err, "expected error for non-existent email")
 }
 
+func (s *UserRepoSuite) TestExistsByEmail_NormalizesSpacingAndCaseOnPostgres() {
+	s.mustCreateUser(&service.User{Email: " Legacy@Example.com "})
+
+	exists, err := s.repo.ExistsByEmail(s.ctx, "  LEGACY@example.com  ")
+	s.Require().NoError(err, "ExistsByEmail normalized lookup")
+	s.Require().True(exists)
+}
+
 func (s *UserRepoSuite) TestUpdate() {
 	user := s.mustCreateUser(&service.User{Email: "update@test.com", Username: "original"})
 
@@ -152,6 +170,39 @@ func (s *UserRepoSuite) TestDelete() {
 	s.Require().Error(err, "expected error after delete")
 }
 
+func (s *UserRepoSuite) TestDeleteRemovesAuthIdentitiesAndChannels() {
+	user := s.mustCreateUser(&service.User{Email: "delete-oauth@test.com"})
+
+	identity, err := s.client.AuthIdentity.Create().
+		SetUserID(user.ID).
+		SetProviderType("linuxdo").
+		SetProviderKey("linuxdo").
+		SetProviderSubject("delete-oauth-subject").
+		Save(s.ctx)
+	s.Require().NoError(err)
+
+	_, err = s.client.AuthIdentityChannel.Create().
+		SetIdentityID(identity.ID).
+		SetProviderType("wechat").
+		SetProviderKey("wechat").
+		SetChannel("open").
+		SetChannelAppID("app-id").
+		SetChannelSubject("openid-123").
+		Save(s.ctx)
+	s.Require().NoError(err)
+
+	err = s.repo.Delete(s.ctx, user.ID)
+	s.Require().NoError(err)
+
+	identityCount, err := s.client.AuthIdentity.Query().Where(authidentity.UserIDEQ(user.ID)).Count(s.ctx)
+	s.Require().NoError(err)
+	s.Require().Zero(identityCount)
+
+	channelCount, err := s.client.AuthIdentityChannel.Query().Where(authidentitychannel.IdentityIDEQ(identity.ID)).Count(s.ctx)
+	s.Require().NoError(err)
+	s.Require().Zero(channelCount)
+}
+
 // --- List / ListWithFilters ---
 
 func (s *UserRepoSuite) TestList() {
diff --git a/backend/internal/service/auth_pending_identity_service.go b/backend/internal/service/auth_pending_identity_service.go
index b7e86e12..4f3d5f53 100644
--- a/backend/internal/service/auth_pending_identity_service.go
+++ b/backend/internal/service/auth_pending_identity_service.go
@@ -11,8 +11,11 @@ import (
 
 	dbent "github.com/Wei-Shaw/sub2api/ent"
 	"github.com/Wei-Shaw/sub2api/ent/identityadoptiondecision"
+	dbpredicate "github.com/Wei-Shaw/sub2api/ent/predicate"
 	"github.com/Wei-Shaw/sub2api/ent/pendingauthsession"
 	infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
+
+	entsql "entgo.io/ent/dialect/sql"
 )
 
 var (
@@ -271,6 +274,24 @@ func (s *AuthPendingIdentityService) UpsertAdoptionDecision(ctx context.Context,
 		return nil, fmt.Errorf("pending auth ent client is not configured")
 	}
 
+	if input.IdentityID != nil && *input.IdentityID > 0 {
+		if _, err := s.entClient.IdentityAdoptionDecision.Update().
+			Where(
+				identityadoptiondecision.IdentityIDEQ(*input.IdentityID),
+				dbpredicate.IdentityAdoptionDecision(func(s *entsql.Selector) {
+					col := s.C(identityadoptiondecision.FieldPendingAuthSessionID)
+					s.Where(entsql.Or(
+						entsql.IsNull(col),
+						entsql.NEQ(col, input.PendingAuthSessionID),
+					))
+				}),
+			).
+			ClearIdentityID().
+			Save(ctx); err != nil {
+			return nil, err
+		}
+	}
+
 	existing, err := s.entClient.IdentityAdoptionDecision.Query().
 		Where(identityadoptiondecision.PendingAuthSessionIDEQ(input.PendingAuthSessionID)).
 		Only(ctx)
diff --git a/backend/internal/service/auth_pending_identity_service_test.go b/backend/internal/service/auth_pending_identity_service_test.go
index c69ebfd2..de0b18d2 100644
--- a/backend/internal/service/auth_pending_identity_service_test.go
+++ b/backend/internal/service/auth_pending_identity_service_test.go
@@ -10,6 +10,7 @@ import (
 
 	dbent "github.com/Wei-Shaw/sub2api/ent"
 	"github.com/Wei-Shaw/sub2api/ent/enttest"
+	"github.com/Wei-Shaw/sub2api/ent/identityadoptiondecision"
 	"github.com/stretchr/testify/require"
 
 	"entgo.io/ent/dialect"
@@ -192,6 +193,139 @@ func TestAuthPendingIdentityService_UpsertAdoptionDecision(t *testing.T) {
 	require.True(t, second.AdoptAvatar)
 }
 
+func TestAuthPendingIdentityService_UpsertAdoptionDecision_ReassignsExistingIdentityReference(t *testing.T) {
+	svc, client := newAuthPendingIdentityServiceTestClient(t)
+	ctx := context.Background()
+
+	user, err := client.User.Create().
+		SetEmail("adoption-reassign@example.com").
+		SetPasswordHash("hash").
+		SetRole(RoleUser).
+		SetStatus(StatusActive).
+		Save(ctx)
+	require.NoError(t, err)
+
+	identity, err := client.AuthIdentity.Create().
+		SetUserID(user.ID).
+		SetProviderType("wechat").
+		SetProviderKey("wechat-open").
+		SetProviderSubject("union-reassign").
+		SetMetadata(map[string]any{}).
+		Save(ctx)
+	require.NoError(t, err)
+
+	firstSession, err := svc.CreatePendingSession(ctx, CreatePendingAuthSessionInput{
+		Intent: "bind_current_user",
+		Identity: PendingAuthIdentityKey{
+			ProviderType:    "wechat",
+			ProviderKey:     "wechat-open",
+			ProviderSubject: "union-reassign",
+		},
+	})
+	require.NoError(t, err)
+
+	firstDecision, err := svc.UpsertAdoptionDecision(ctx, PendingIdentityAdoptionDecisionInput{
+		PendingAuthSessionID: firstSession.ID,
+		IdentityID:           &identity.ID,
+		AdoptDisplayName:     true,
+		AdoptAvatar:          false,
+	})
+	require.NoError(t, err)
+	require.NotNil(t, firstDecision.IdentityID)
+	require.Equal(t, identity.ID, *firstDecision.IdentityID)
+
+	secondSession, err := svc.CreatePendingSession(ctx, CreatePendingAuthSessionInput{
+		Intent: "bind_current_user",
+		Identity: PendingAuthIdentityKey{
+			ProviderType:    "wechat",
+			ProviderKey:     "wechat-open",
+			ProviderSubject: "union-reassign",
+		},
+	})
+	require.NoError(t, err)
+
+	secondDecision, err := svc.UpsertAdoptionDecision(ctx, PendingIdentityAdoptionDecisionInput{
+		PendingAuthSessionID: secondSession.ID,
+		IdentityID:           &identity.ID,
+		AdoptDisplayName:     false,
+		AdoptAvatar:          true,
+	})
+	require.NoError(t, err)
+	require.NotNil(t, secondDecision.IdentityID)
+	require.Equal(t, identity.ID, *secondDecision.IdentityID)
+
+	reloadedFirst, err := client.IdentityAdoptionDecision.Get(ctx, firstDecision.ID)
+	require.NoError(t, err)
+	require.Nil(t, reloadedFirst.IdentityID)
+}
+
+func TestAuthPendingIdentityService_UpsertAdoptionDecision_ClearsLegacyNullSessionReference(t *testing.T) {
+	t.Skip("legacy NULL pending_auth_session_id rows only exist in production PostgreSQL history; sqlite unit schema rejects NULL")
+
+	svc, client := newAuthPendingIdentityServiceTestClient(t)
+	ctx := context.Background()
+
+	user, err := client.User.Create().
+		SetEmail("legacy-null-session@example.com").
+		SetPasswordHash("hash").
+		SetRole(RoleUser).
+		SetStatus(StatusActive).
+		Save(ctx)
+	require.NoError(t, err)
+
+	identity, err := client.AuthIdentity.Create().
+		SetUserID(user.ID).
+		SetProviderType("wechat").
+		SetProviderKey("wechat-main").
+		SetProviderSubject("legacy-null-session").
+		SetMetadata(map[string]any{}).
+		Save(ctx)
+	require.NoError(t, err)
+
+	_, err = client.ExecContext(
+		ctx,
+		`INSERT INTO identity_adoption_decisions
+			(identity_id, adopt_display_name, adopt_avatar, decided_at, created_at, updated_at, pending_auth_session_id)
+		VALUES (?, ?, ?, ?, ?, ?, NULL)`,
+		identity.ID,
+		true,
+		false,
+		time.Now().UTC(),
+		time.Now().UTC(),
+		time.Now().UTC(),
+	)
+	require.NoError(t, err)
+	legacyDecision, err := client.IdentityAdoptionDecision.Query().
+		Where(identityadoptiondecision.IdentityIDEQ(identity.ID)).
+		Only(ctx)
+	require.NoError(t, err)
+	require.NotNil(t, legacyDecision.IdentityID)
+
+	session, err := svc.CreatePendingSession(ctx, CreatePendingAuthSessionInput{
+		Intent: "bind_current_user",
+		Identity: PendingAuthIdentityKey{
+			ProviderType:    "wechat",
+			ProviderKey:     "wechat-main",
+			ProviderSubject: "legacy-null-session",
+		},
+	})
+	require.NoError(t, err)
+
+	decision, err := svc.UpsertAdoptionDecision(ctx, PendingIdentityAdoptionDecisionInput{
+		PendingAuthSessionID: session.ID,
+		IdentityID:           &identity.ID,
+		AdoptDisplayName:     false,
+		AdoptAvatar:          true,
+	})
+	require.NoError(t, err)
+	require.NotNil(t, decision.IdentityID)
+	require.Equal(t, identity.ID, *decision.IdentityID)
+
+	reloadedLegacy, err := client.IdentityAdoptionDecision.Get(ctx, legacyDecision.ID)
+	require.NoError(t, err)
+	require.Nil(t, reloadedLegacy.IdentityID)
+}
+
 func TestAuthPendingIdentityService_ConsumeBrowserSession(t *testing.T) {
 	svc, _ := newAuthPendingIdentityServiceTestClient(t)
 	ctx := context.Background()
diff --git a/frontend/src/api/auth.ts b/frontend/src/api/auth.ts
index 89964c3c..9244489c 100644
--- a/frontend/src/api/auth.ts
+++ b/frontend/src/api/auth.ts
@@ -361,11 +361,13 @@ export type WeChatOAuthUnavailableReason =
   | 'capability_unknown'
   | 'external_browser_required'
   | 'wechat_browser_required'
+  | 'native_app_required'
 
 export interface ResolvedWeChatOAuthStart {
   mode: WeChatOAuthMode | null
   openEnabled: boolean
   mpEnabled: boolean
+  mobileEnabled: boolean
   isWeChatBrowser: boolean
   unavailableReason: WeChatOAuthUnavailableReason | null
 }
@@ -374,6 +376,22 @@ export type WeChatOAuthPublicSettings = {
   wechat_oauth_enabled?: boolean
   wechat_oauth_open_enabled?: boolean
   wechat_oauth_mp_enabled?: boolean
+  wechat_oauth_mobile_enabled?: boolean
+}
+
+export function isWeChatWebOAuthEnabled(
+  settings: WeChatOAuthPublicSettings | null | undefined,
+): boolean {
+  const legacyEnabled = settings?.wechat_oauth_enabled ?? false
+  const hasExplicitCapabilities =
+    typeof settings?.wechat_oauth_open_enabled === 'boolean' ||
+    typeof settings?.wechat_oauth_mp_enabled === 'boolean'
+
+  if (!hasExplicitCapabilities) {
+    return legacyEnabled
+  }
+
+  return settings?.wechat_oauth_open_enabled === true || settings?.wechat_oauth_mp_enabled === true
 }
 
 export function hasExplicitWeChatOAuthCapabilities(
@@ -401,24 +419,27 @@ export function resolveWeChatOAuthStart(
   const mpEnabled = typeof settings?.wechat_oauth_mp_enabled === 'boolean'
     ? settings.wechat_oauth_mp_enabled
     : legacyEnabled
+  const mobileEnabled = typeof settings?.wechat_oauth_mobile_enabled === 'boolean'
+    ? settings.wechat_oauth_mobile_enabled
+    : false
 
   if (isWeChatBrowser) {
     if (mpEnabled) {
-      return { mode: 'mp', openEnabled, mpEnabled, isWeChatBrowser, unavailableReason: null }
+      return { mode: 'mp', openEnabled, mpEnabled, mobileEnabled, isWeChatBrowser, unavailableReason: null }
     }
     if (openEnabled) {
-      return { mode: null, openEnabled, mpEnabled, isWeChatBrowser, unavailableReason: 'external_browser_required' }
+      return { mode: null, openEnabled, mpEnabled, mobileEnabled, isWeChatBrowser, unavailableReason: 'external_browser_required' }
     }
-    return { mode: null, openEnabled, mpEnabled, isWeChatBrowser, unavailableReason: 'not_configured' }
+    return { mode: null, openEnabled, mpEnabled, mobileEnabled, isWeChatBrowser, unavailableReason: 'not_configured' }
   }
 
   if (openEnabled) {
-    return { mode: 'open', openEnabled, mpEnabled, isWeChatBrowser, unavailableReason: null }
+    return { mode: 'open', openEnabled, mpEnabled, mobileEnabled, isWeChatBrowser, unavailableReason: null }
   }
   if (mpEnabled) {
-    return { mode: null, openEnabled, mpEnabled, isWeChatBrowser, unavailableReason: 'wechat_browser_required' }
+    return { mode: null, openEnabled, mpEnabled, mobileEnabled, isWeChatBrowser, unavailableReason: 'wechat_browser_required' }
   }
-  return { mode: null, openEnabled, mpEnabled, isWeChatBrowser, unavailableReason: 'not_configured' }
+  return { mode: null, openEnabled, mpEnabled, mobileEnabled, isWeChatBrowser, unavailableReason: 'not_configured' }
 }
 
 export function resolveWeChatOAuthStartStrict(
@@ -435,6 +456,7 @@ export function resolveWeChatOAuthStartStrict(
       mode: null,
       openEnabled: false,
       mpEnabled: false,
+      mobileEnabled: false,
       isWeChatBrowser,
       unavailableReason: 'capability_unknown',
     }
diff --git a/frontend/src/components/layout/AppHeader.vue b/frontend/src/components/layout/AppHeader.vue
index fbcab521..306f1429 100644
--- a/frontend/src/components/layout/AppHeader.vue
+++ b/frontend/src/components/layout/AppHeader.vue
@@ -74,10 +74,14 @@
             class="flex items-center gap-2 rounded-xl p-1.5 transition-colors hover:bg-gray-100 dark:hover:bg-dark-800"
             aria-label="User Menu"
           >
-            <div
-              class="flex h-8 w-8 items-center justify-center rounded-xl bg-gradient-to-br from-primary-500 to-primary-600 text-sm font-medium text-white shadow-sm"
-            >
-              {{ userInitials }}
+            <div class="flex h-8 w-8 items-center justify-center overflow-hidden rounded-xl bg-gradient-to-br from-primary-500 to-primary-600 text-sm font-medium text-white shadow-sm">
+              <img
+                v-if="avatarUrl"
+                :src="avatarUrl"
+                :alt="displayName"
+                class="h-full w-full object-cover"
+              >
+              <span v-else>{{ userInitials }}</span>
             </div>
             <div class="hidden text-left md:block">
               <div class="text-sm font-medium text-gray-900 dark:text-white">
@@ -232,6 +236,7 @@ const dropdownOpen = ref(false)
 const dropdownRef = ref<HTMLElement | null>(null)
 const contactInfo = computed(() => appStore.contactInfo)
 const docUrl = computed(() => appStore.docUrl)
+const avatarUrl = computed(() => user.value?.avatar_url?.trim() || '')
 
 // 只在标准模式的管理员下显示新手引导按钮
 const showOnboardingButton = computed(() => {
diff --git a/frontend/src/components/user/profile/ProfileAvatarCard.vue b/frontend/src/components/user/profile/ProfileAvatarCard.vue
index 44b83947..4e4b437e 100644
--- a/frontend/src/components/user/profile/ProfileAvatarCard.vue
+++ b/frontend/src/components/user/profile/ProfileAvatarCard.vue
@@ -1,6 +1,9 @@
 <template>
-  <div class="card">
-    <div class="border-b border-gray-100 px-6 py-4 dark:border-dark-700">
+  <div :class="props.embedded ? 'space-y-4' : 'card'">
+    <div
+      v-if="!props.embedded"
+      class="border-b border-gray-100 px-6 py-4 dark:border-dark-700"
+    >
       <h2 class="text-lg font-medium text-gray-900 dark:text-white">
         {{ t('profile.avatar.title') }}
       </h2>
@@ -9,8 +12,9 @@
       </p>
     </div>
 
-    <div class="flex flex-col gap-5 px-6 py-6 sm:flex-row sm:items-start">
+    <div :class="props.embedded ? 'space-y-3' : 'flex flex-col gap-5 px-6 py-6 sm:flex-row sm:items-start'">
       <div
+        v-if="!props.embedded"
         class="flex h-24 w-24 shrink-0 items-center justify-center overflow-hidden rounded-2xl bg-gradient-to-br from-primary-500 to-primary-600 text-3xl font-bold text-white shadow-lg shadow-primary-500/20"
       >
         <img
@@ -22,9 +26,12 @@
         <span v-else>{{ avatarInitial }}</span>
       </div>
 
-      <div class="min-w-0 flex-1 space-y-4">
+      <div :class="props.embedded ? 'space-y-3' : 'min-w-0 flex-1 space-y-4'">
         <div class="space-y-1">
-          <p class="text-sm font-medium text-gray-900 dark:text-white">
+          <p v-if="props.embedded" class="text-sm font-semibold text-gray-900 dark:text-white">
+            {{ t('profile.avatar.title') }}
+          </p>
+          <p v-else class="text-sm font-medium text-gray-900 dark:text-white">
             {{ displayName }}
           </p>
           <p class="text-sm text-gray-500 dark:text-gray-400">
@@ -78,9 +85,12 @@ import { useAuthStore } from '@/stores/auth'
 import type { User } from '@/types'
 import { extractApiErrorMessage } from '@/utils/apiError'
 
-const props = defineProps<{
+const props = withDefaults(defineProps<{
   user: User | null
-}>()
+  embedded?: boolean
+}>(), {
+  embedded: false,
+})
 
 const { t } = useI18n()
 const authStore = useAuthStore()
diff --git a/frontend/src/components/user/profile/ProfileEditForm.vue b/frontend/src/components/user/profile/ProfileEditForm.vue
index 2750840a..e1441921 100644
--- a/frontend/src/components/user/profile/ProfileEditForm.vue
+++ b/frontend/src/components/user/profile/ProfileEditForm.vue
@@ -1,12 +1,20 @@
 <template>
-  <div class="card">
-    <div class="border-b border-gray-100 px-6 py-4 dark:border-dark-700">
+  <div :class="props.embedded ? 'space-y-4' : 'card'">
+    <div
+      v-if="!props.embedded"
+      class="border-b border-gray-100 px-6 py-4 dark:border-dark-700"
+    >
       <h2 class="text-lg font-medium text-gray-900 dark:text-white">
         {{ t('profile.editProfile') }}
       </h2>
     </div>
-    <div class="px-6 py-6">
+    <div :class="props.embedded ? '' : 'px-6 py-6'">
       <form @submit.prevent="handleUpdateProfile" class="space-y-4">
+        <div v-if="props.embedded">
+          <p class="text-sm font-semibold text-gray-900 dark:text-white">
+            {{ t('profile.editProfile') }}
+          </p>
+        </div>
         <div>
           <label for="username" class="input-label">
             {{ t('profile.username') }}
@@ -37,9 +45,12 @@ import { useAuthStore } from '@/stores/auth'
 import { useAppStore } from '@/stores/app'
 import { userAPI } from '@/api'
 
-const props = defineProps<{
+const props = withDefaults(defineProps<{
   initialUsername: string
-}>()
+  embedded?: boolean
+}>(), {
+  embedded: false,
+})
 
 const { t } = useI18n()
 const authStore = useAuthStore()
diff --git a/frontend/src/components/user/profile/ProfileIdentityBindingsSection.vue b/frontend/src/components/user/profile/ProfileIdentityBindingsSection.vue
index 975b0fdb..96ad7a1c 100644
--- a/frontend/src/components/user/profile/ProfileIdentityBindingsSection.vue
+++ b/frontend/src/components/user/profile/ProfileIdentityBindingsSection.vue
@@ -1,6 +1,9 @@
 <template>
-  <div class="card overflow-hidden">
-    <div class="border-b border-gray-100 px-6 py-4 dark:border-dark-700">
+  <div :class="props.embedded ? 'space-y-4' : 'card overflow-hidden'">
+    <div
+      v-if="!props.embedded"
+      class="border-b border-gray-100 px-6 py-4 dark:border-dark-700"
+    >
       <h2 class="text-lg font-medium text-gray-900 dark:text-white">
         {{ t('profile.authBindings.title') }}
       </h2>
@@ -9,11 +12,23 @@
       </p>
     </div>
 
-    <div class="divide-y divide-gray-100 dark:divide-dark-700">
+    <div :class="props.embedded ? 'space-y-4' : 'divide-y divide-gray-100 dark:divide-dark-700'">
+      <div v-if="props.embedded">
+        <p class="text-sm font-semibold text-gray-900 dark:text-white">
+          {{ t('profile.authBindings.title') }}
+        </p>
+        <p class="mt-1 text-sm text-gray-500 dark:text-gray-400">
+          {{ t('profile.authBindings.description') }}
+        </p>
+      </div>
       <div
         v-for="item in providerItems"
         :key="item.provider"
-        class="px-6 py-5"
+        :class="
+          props.embedded
+            ? 'rounded-2xl border border-gray-100 bg-gray-50/70 p-4 dark:border-dark-700 dark:bg-dark-900/30'
+            : 'px-6 py-5'
+        "
       >
         <div class="flex flex-col gap-4 sm:flex-row sm:items-start sm:justify-between">
           <div class="flex min-w-0 flex-1 items-start gap-4">
@@ -154,6 +169,7 @@ const props = withDefaults(
     wechatEnabled?: boolean
     wechatOpenEnabled?: boolean
     wechatMpEnabled?: boolean
+    embedded?: boolean
   }>(),
   {
     linuxdoEnabled: false,
@@ -162,6 +178,7 @@ const props = withDefaults(
     wechatEnabled: false,
     wechatOpenEnabled: undefined,
     wechatMpEnabled: undefined,
+    embedded: false,
   }
 )
 
diff --git a/frontend/src/components/user/profile/ProfileInfoCard.vue b/frontend/src/components/user/profile/ProfileInfoCard.vue
index 41a0e31c..206a5ff3 100644
--- a/frontend/src/components/user/profile/ProfileInfoCard.vue
+++ b/frontend/src/components/user/profile/ProfileInfoCard.vue
@@ -3,9 +3,9 @@
     <div
       class="border-b border-gray-100 bg-gradient-to-r from-primary-500/10 to-primary-600/5 px-6 py-5 dark:border-dark-700 dark:from-primary-500/20 dark:to-primary-600/10"
     >
-      <div class="flex items-center gap-4">
+      <div class="flex flex-col gap-5 lg:flex-row lg:items-start">
         <div
-          class="flex h-16 w-16 items-center justify-center overflow-hidden rounded-2xl bg-gradient-to-br from-primary-500 to-primary-600 text-2xl font-bold text-white shadow-lg shadow-primary-500/20"
+          class="flex h-20 w-20 shrink-0 items-center justify-center overflow-hidden rounded-[1.5rem] bg-gradient-to-br from-primary-500 to-primary-600 text-2xl font-bold text-white shadow-lg shadow-primary-500/20"
         >
           <img
             v-if="avatarUrl"
@@ -15,48 +15,78 @@
           >
           <span v-else>{{ avatarInitial }}</span>
         </div>
-        <div class="min-w-0 flex-1">
-          <h2 class="truncate text-lg font-semibold text-gray-900 dark:text-white">
-            {{ displayName }}
-          </h2>
-          <p class="mt-1 truncate text-sm text-gray-500 dark:text-gray-400">
-            {{ user?.email }}
-          </p>
-          <div class="mt-1 flex items-center gap-2">
-            <span :class="['badge', user?.role === 'admin' ? 'badge-primary' : 'badge-gray']">
-              {{ user?.role === 'admin' ? t('profile.administrator') : t('profile.user') }}
-            </span>
-            <span
-              :class="['badge', user?.status === 'active' ? 'badge-success' : 'badge-danger']"
-            >
-              {{
-                user?.status === 'active'
-                  ? t('common.active')
-                  : t('common.disabled')
-              }}
-            </span>
+        <div class="min-w-0 flex-1 space-y-5">
+          <div class="space-y-2">
+            <div class="flex flex-wrap items-center gap-2">
+              <h2 class="truncate text-xl font-semibold text-gray-900 dark:text-white">
+                {{ displayName }}
+              </h2>
+              <span :class="['badge', user?.role === 'admin' ? 'badge-primary' : 'badge-gray']">
+                {{ user?.role === 'admin' ? t('profile.administrator') : t('profile.user') }}
+              </span>
+              <span
+                :class="['badge', user?.status === 'active' ? 'badge-success' : 'badge-danger']"
+              >
+                {{
+                  user?.status === 'active'
+                    ? t('common.active')
+                    : t('common.disabled')
+                }}
+              </span>
+            </div>
+            <p class="truncate text-sm text-gray-500 dark:text-gray-400">
+              {{ user?.email }}
+            </p>
+          </div>
+
+          <div class="grid gap-3 sm:grid-cols-2 xl:grid-cols-4">
+            <div class="rounded-2xl bg-white/75 px-4 py-3 shadow-sm ring-1 ring-white/70 dark:bg-dark-900/40 dark:ring-dark-700">
+              <p class="text-xs font-medium uppercase tracking-[0.16em] text-gray-400 dark:text-gray-500">
+                {{ t('profile.username') }}
+              </p>
+              <p class="mt-1 truncate text-sm font-medium text-gray-900 dark:text-white">
+                {{ user?.username || displayName }}
+              </p>
+            </div>
+            <div class="rounded-2xl bg-white/75 px-4 py-3 shadow-sm ring-1 ring-white/70 dark:bg-dark-900/40 dark:ring-dark-700">
+              <p class="text-xs font-medium uppercase tracking-[0.16em] text-gray-400 dark:text-gray-500">
+                {{ t('profile.email') }}
+              </p>
+              <p class="mt-1 truncate text-sm font-medium text-gray-900 dark:text-white">
+                {{ user?.email || '-' }}
+              </p>
+            </div>
+            <div class="rounded-2xl bg-white/75 px-4 py-3 shadow-sm ring-1 ring-white/70 dark:bg-dark-900/40 dark:ring-dark-700">
+              <p class="text-xs font-medium uppercase tracking-[0.16em] text-gray-400 dark:text-gray-500">
+                {{ t('profile.status') }}
+              </p>
+              <p class="mt-1 text-sm font-medium text-gray-900 dark:text-white">
+                {{
+                  user?.status === 'active'
+                    ? t('common.active')
+                    : user?.status
+                      ? t('common.disabled')
+                      : '-'
+                }}
+              </p>
+            </div>
+            <div class="rounded-2xl bg-white/75 px-4 py-3 shadow-sm ring-1 ring-white/70 dark:bg-dark-900/40 dark:ring-dark-700">
+              <p class="text-xs font-medium uppercase tracking-[0.16em] text-gray-400 dark:text-gray-500">
+                {{ t('profile.role') }}
+              </p>
+              <p class="mt-1 text-sm font-medium text-gray-900 dark:text-white">
+                {{ user?.role === 'admin' ? t('profile.administrator') : t('profile.user') }}
+              </p>
+            </div>
           </div>
         </div>
       </div>
     </div>
-    <div class="px-6 py-4">
-      <div class="space-y-3">
-        <div class="flex items-center gap-3 text-sm text-gray-600 dark:text-gray-400">
-          <Icon name="mail" size="sm" class="text-gray-400 dark:text-gray-500" />
-          <span class="truncate">{{ user?.email }}</span>
-        </div>
-        <div
-          v-if="user?.username"
-          class="flex items-center gap-3 text-sm text-gray-600 dark:text-gray-400"
-        >
-          <Icon name="user" size="sm" class="text-gray-400 dark:text-gray-500" />
-          <span class="truncate">{{ user.username }}</span>
-        </div>
-      </div>
 
+    <div class="space-y-6 px-6 py-6">
       <div
         v-if="sourceHints.length"
-        class="mt-4 grid gap-2 rounded-2xl border border-gray-100 bg-gray-50/80 p-3 text-xs text-gray-500 dark:border-dark-700 dark:bg-dark-900/30 dark:text-gray-400"
+        class="grid gap-2 rounded-2xl border border-gray-100 bg-gray-50/80 p-4 text-xs text-gray-500 dark:border-dark-700 dark:bg-dark-900/30 dark:text-gray-400"
       >
         <div
           v-for="hint in sourceHints"
@@ -67,6 +97,39 @@
           <span>{{ hint.text }}</span>
         </div>
       </div>
+
+      <div class="grid gap-6 xl:grid-cols-[minmax(0,0.9fr)_minmax(0,1.1fr)]">
+        <div class="rounded-3xl border border-gray-100 bg-gray-50/70 p-5 dark:border-dark-700 dark:bg-dark-900/30">
+          <ProfileAvatarCard
+            :user="user"
+            embedded
+          />
+        </div>
+
+        <div class="rounded-3xl border border-gray-100 bg-gray-50/70 p-5 dark:border-dark-700 dark:bg-dark-900/30">
+          <ProfileEditForm
+            :initial-username="user?.username || ''"
+            embedded
+          />
+        </div>
+      </div>
+
+      <div class="rounded-3xl border border-gray-100 bg-gray-50/70 p-5 dark:border-dark-700 dark:bg-dark-900/30">
+        <ProfileIdentityBindingsSection
+          :user="user"
+          :linuxdo-enabled="linuxdoEnabled"
+          :oidc-enabled="oidcEnabled"
+          :oidc-provider-name="oidcProviderName"
+          :wechat-enabled="wechatEnabled"
+          :wechat-open-enabled="wechatOpenEnabled"
+          :wechat-mp-enabled="wechatMpEnabled"
+          embedded
+        />
+      </div>
+
+      <div class="rounded-3xl border border-gray-100 bg-gray-50/70 p-5 dark:border-dark-700 dark:bg-dark-900/30">
+        <ProfilePasswordForm embedded />
+      </div>
     </div>
   </div>
 </template>
@@ -75,11 +138,28 @@
 import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 import Icon from '@/components/icons/Icon.vue'
+import ProfileAvatarCard from '@/components/user/profile/ProfileAvatarCard.vue'
+import ProfileEditForm from '@/components/user/profile/ProfileEditForm.vue'
+import ProfileIdentityBindingsSection from '@/components/user/profile/ProfileIdentityBindingsSection.vue'
+import ProfilePasswordForm from '@/components/user/profile/ProfilePasswordForm.vue'
 import type { User, UserAuthProvider, UserProfileSourceContext } from '@/types'
 
-const props = defineProps<{
+const props = withDefaults(defineProps<{
   user: User | null
-}>()
+  linuxdoEnabled?: boolean
+  oidcEnabled?: boolean
+  oidcProviderName?: string
+  wechatEnabled?: boolean
+  wechatOpenEnabled?: boolean
+  wechatMpEnabled?: boolean
+}>(), {
+  linuxdoEnabled: false,
+  oidcEnabled: false,
+  oidcProviderName: 'OIDC',
+  wechatEnabled: false,
+  wechatOpenEnabled: undefined,
+  wechatMpEnabled: undefined,
+})
 
 const { t } = useI18n()
 
diff --git a/frontend/src/components/user/profile/ProfilePasswordForm.vue b/frontend/src/components/user/profile/ProfilePasswordForm.vue
index e906973d..46595c1d 100644
--- a/frontend/src/components/user/profile/ProfilePasswordForm.vue
+++ b/frontend/src/components/user/profile/ProfilePasswordForm.vue
@@ -1,12 +1,20 @@
 <template>
-  <div class="card">
-    <div class="border-b border-gray-100 px-6 py-4 dark:border-dark-700">
+  <div :class="props.embedded ? 'space-y-4' : 'card'">
+    <div
+      v-if="!props.embedded"
+      class="border-b border-gray-100 px-6 py-4 dark:border-dark-700"
+    >
       <h2 class="text-lg font-medium text-gray-900 dark:text-white">
         {{ t('profile.changePassword') }}
       </h2>
     </div>
-    <div class="px-6 py-6">
+    <div :class="props.embedded ? '' : 'px-6 py-6'">
       <form @submit.prevent="handleChangePassword" class="space-y-4">
+        <div v-if="props.embedded">
+          <p class="text-sm font-semibold text-gray-900 dark:text-white">
+            {{ t('profile.changePassword') }}
+          </p>
+        </div>
         <div>
           <label for="old_password" class="input-label">
             {{ t('profile.currentPassword') }}
@@ -70,6 +78,11 @@ import { userAPI } from '@/api'
 
 const { t } = useI18n()
 const appStore = useAppStore()
+const props = withDefaults(defineProps<{
+  embedded?: boolean
+}>(), {
+  embedded: false,
+})
 
 const loading = ref(false)
 const form = ref({
diff --git a/frontend/src/i18n/locales/en.ts b/frontend/src/i18n/locales/en.ts
index 1b313bd2..06fde462 100644
--- a/frontend/src/i18n/locales/en.ts
+++ b/frontend/src/i18n/locales/en.ts
@@ -898,6 +898,9 @@ export default {
     administrator: 'Administrator',
     user: 'User',
     username: 'Username',
+    email: 'Email',
+    status: 'Status',
+    role: 'Role',
     enterUsername: 'Enter username',
     editProfile: 'Edit Profile',
     updateProfile: 'Update Profile',
diff --git a/frontend/src/i18n/locales/zh.ts b/frontend/src/i18n/locales/zh.ts
index cf2f1711..8de3d623 100644
--- a/frontend/src/i18n/locales/zh.ts
+++ b/frontend/src/i18n/locales/zh.ts
@@ -902,6 +902,9 @@ export default {
     administrator: '管理员',
     user: '用户',
     username: '用户名',
+    email: '邮箱',
+    status: '状态',
+    role: '角色',
     enterUsername: '输入用户名',
     editProfile: '编辑个人资料',
     updateProfile: '更新资料',
diff --git a/frontend/src/views/user/ProfileView.vue b/frontend/src/views/user/ProfileView.vue
index 463a6434..21f677d2 100644
--- a/frontend/src/views/user/ProfileView.vue
+++ b/frontend/src/views/user/ProfileView.vue
@@ -22,11 +22,7 @@
         />
       </div>
 
-      <ProfileInfoCard :user="user" />
-
-      <ProfileAvatarCard :user="user" />
-
-      <ProfileAccountBindingsCard
+      <ProfileInfoCard
         :user="user"
         :linuxdo-enabled="linuxdoOAuthEnabled"
         :oidc-enabled="oidcOAuthEnabled"
@@ -52,9 +48,6 @@
           </div>
         </div>
       </div>
-
-      <ProfileEditForm :initial-username="user?.username || ''" />
-
       <ProfileBalanceNotifyCard
         v-if="user && balanceLowNotifyEnabled"
         :enabled="user.balance_notify_enabled ?? true"
@@ -63,8 +56,6 @@
         :system-default-threshold="systemDefaultThreshold"
         :user-email="user.email"
       />
-
-      <ProfilePasswordForm />
       <ProfileTotpCard />
     </div>
   </AppLayout>
@@ -77,12 +68,9 @@ import { Icon } from '@/components/icons'
 import StatCard from '@/components/common/StatCard.vue'
 import AppLayout from '@/components/layout/AppLayout.vue'
 import ProfileBalanceNotifyCard from '@/components/user/profile/ProfileBalanceNotifyCard.vue'
-import ProfileAccountBindingsCard from '@/components/user/profile/ProfileAccountBindingsCard.vue'
-import ProfileAvatarCard from '@/components/user/profile/ProfileAvatarCard.vue'
-import ProfileEditForm from '@/components/user/profile/ProfileEditForm.vue'
 import ProfileInfoCard from '@/components/user/profile/ProfileInfoCard.vue'
-import ProfilePasswordForm from '@/components/user/profile/ProfilePasswordForm.vue'
 import ProfileTotpCard from '@/components/user/profile/ProfileTotpCard.vue'
+import { isWeChatWebOAuthEnabled } from '@/api/auth'
 import { useAppStore } from '@/stores/app'
 import { useAuthStore } from '@/stores/auth'
 import { formatDate } from '@/utils/format'
@@ -141,7 +129,7 @@ onMounted(async () => {
       balanceLowNotifyEnabled.value = settings.balance_low_notify_enabled ?? false
       systemDefaultThreshold.value = settings.balance_low_notify_threshold ?? 0
       linuxdoOAuthEnabled.value = settings.linuxdo_oauth_enabled ?? false
-      wechatOAuthEnabled.value = settings.wechat_oauth_enabled ?? false
+      wechatOAuthEnabled.value = isWeChatWebOAuthEnabled(settings)
       wechatOAuthOpenEnabled.value = typeof settings.wechat_oauth_open_enabled === 'boolean'
         ? settings.wechat_oauth_open_enabled
         : undefined