diff --git a/backend/src/services/capitalLedgerRepository.ts b/backend/src/services/capitalLedgerRepository.ts
index ee8eb24..af55c86 100644
--- a/backend/src/services/capitalLedgerRepository.ts
+++ b/backend/src/services/capitalLedgerRepository.ts
@@ -1,7 +1,7 @@
 import { getContainer } from '@bytelyst/cosmos';
 import { config } from '../config/index.js';
 import logger from '../utils/logger.js';
-import { supabaseService } from './SupabaseService.js';
+import { getLegacySupabaseClient } from './legacySupabaseClient.js';
 import type { CapitalLedgerRecord } from './CapitalLedger.js';
 
 const CONTAINER_NAME = 'capital_ledgers';
@@ -27,7 +27,7 @@ function isCosmosConfigured(): boolean {
 }
 
 function getLegacyClient() {
-    return supabaseService.getClient();
+    return getLegacySupabaseClient();
 }
 
 function toLedgerRecord(doc: Partial<CapitalLedgerDocument> | null | undefined): CapitalLedgerRecord | null {
diff --git a/backend/src/services/distributedLockService.ts b/backend/src/services/distributedLockService.ts
index 70aa874..6f1440e 100644
--- a/backend/src/services/distributedLockService.ts
+++ b/backend/src/services/distributedLockService.ts
@@ -1,5 +1,5 @@
 import logger from '../utils/logger.js';
-import { supabaseService } from './SupabaseService.js';
+import { getLegacySupabaseClient } from './legacySupabaseClient.js';
 import { healthTracker } from './healthTracker.js';
 import { observabilityService } from './observabilityService.js';
 import * as distributedLockRepository from './distributedLockRepository.js';
@@ -21,7 +21,7 @@ export class DistributedLockService {
     private async tryAcquireRowLockLegacy(profileId: string, symbol: string | undefined, owner: string, ttlSeconds: number = 30): Promise<boolean> {
         if (!profileId || !owner) return false;
         const normalizedSymbol = normalizeSymbol(symbol);
-        const client = supabaseService.getClient();
+        const client = getLegacySupabaseClient();
         if (!client) return false;
 
         const ttl = Number.isFinite(ttlSeconds) ? Math.max(1, ttlSeconds) : 30;
@@ -62,7 +62,7 @@ export class DistributedLockService {
     private async releaseRowLockLegacy(profileId: string, symbol: string | undefined, owner: string): Promise<boolean> {
         if (!profileId || !owner) return false;
         const normalizedSymbol = normalizeSymbol(symbol);
-        const client = supabaseService.getClient();
+        const client = getLegacySupabaseClient();
         if (!client) return false;
 
         const { data, error } = await client
@@ -97,7 +97,7 @@ export class DistributedLockService {
 
     private async tryAcquireReconciliationLockLegacy(profileId: string, owner: string, ttlSeconds: number = 30): Promise<boolean> {
         if (!profileId || !owner) return false;
-        const client = supabaseService.getClient();
+        const client = getLegacySupabaseClient();
         if (!client) return false;
 
         const ttl = Number.isFinite(ttlSeconds) ? Math.max(1, ttlSeconds) : 30;
@@ -132,7 +132,7 @@ export class DistributedLockService {
 
     private async releaseReconciliationLockLegacy(profileId: string, owner: string): Promise<boolean> {
         if (!profileId || !owner) return false;
-        const client = supabaseService.getClient();
+        const client = getLegacySupabaseClient();
         if (!client) return false;
 
         const { data, error } = await client
@@ -162,7 +162,7 @@ export class DistributedLockService {
     private async isEntryInProgressLegacy(profileId: string, symbol?: string): Promise<boolean> {
         if (!profileId) return false;
         const normalizedSymbol = normalizeSymbol(symbol);
-        const client = supabaseService.getClient();
+        const client = getLegacySupabaseClient();
         if (!client) return false;
 
         const { data, error } = await client
diff --git a/backend/src/services/legacySupabaseClient.ts b/backend/src/services/legacySupabaseClient.ts
new file mode 100644
index 0000000..fb9f26f
--- /dev/null
+++ b/backend/src/services/legacySupabaseClient.ts
@@ -0,0 +1,20 @@
+import type { SupabaseClient } from '@supabase/supabase-js';
+import { supabaseService } from './SupabaseService.js';
+
+/**
+ * Single import surface for legacy Postgres (Supabase JS client) access outside SupabaseService.
+ * Auth-specific entry points stay on platformAuthService / supabaseService as needed.
+ */
+export function getLegacySupabaseClient(): SupabaseClient | null {
+    return supabaseService.getClient();
+}
+
+export async function loadLatestLegacyBotStateSnapshot(
+    ownerId: string
+): Promise<{ state: unknown } | null> {
+    return supabaseService.loadLatestBotStateSnapshot(ownerId);
+}
+
+export async function saveLegacyBotStateSnapshot(ownerId: string, state: unknown): Promise<void> {
+    await supabaseService.saveBotStateSnapshot(ownerId, state);
+}
diff --git a/backend/src/services/profileRepository.ts b/backend/src/services/profileRepository.ts
index 9b070cc..8361bdc 100644
--- a/backend/src/services/profileRepository.ts
+++ b/backend/src/services/profileRepository.ts
@@ -2,7 +2,7 @@ import { getContainer } from '@bytelyst/cosmos';
 import { randomUUID } from 'node:crypto';
 import { config } from '../config/index.js';
 import logger from '../utils/logger.js';
-import { supabaseService } from './SupabaseService.js';
+import { getLegacySupabaseClient } from './legacySupabaseClient.js';
 
 export interface TradingUserProfile {
     user_id: string;
@@ -62,7 +62,7 @@ function isCosmosConfigured(): boolean {
 }
 
 function getLegacyClient() {
-    return supabaseService.getClient();
+    return getLegacySupabaseClient();
 }
 
 function normalizeProfile(row: Partial<TradeProfileRecord> | null | undefined): TradeProfileRecord | null {
diff --git a/backend/src/services/snapshotRepository.ts b/backend/src/services/snapshotRepository.ts
index a617b98..60836b6 100644
--- a/backend/src/services/snapshotRepository.ts
+++ b/backend/src/services/snapshotRepository.ts
@@ -1,7 +1,7 @@
 import { getContainer } from '@bytelyst/cosmos';
 import { config } from '../config/index.js';
 import logger from '../utils/logger.js';
-import { supabaseService } from './SupabaseService.js';
+import { loadLatestLegacyBotStateSnapshot, saveLegacyBotStateSnapshot } from './legacySupabaseClient.js';
 import { listActiveTradingUsers } from './userRepository.js';
 
 const CONTAINER_NAME = 'bot_state_snapshots';
@@ -46,7 +46,7 @@ export async function loadLatestBotStateSnapshot(
 ): Promise<{ state: unknown } | null> {
     if (!ownerId) return null;
 
-    const loadLegacySnapshot = async () => supabaseService.loadLatestBotStateSnapshot(ownerId);
+    const loadLegacySnapshot = async () => loadLatestLegacyBotStateSnapshot(ownerId);
 
     if (!isCosmosConfigured()) {
         return loadLegacySnapshot();
@@ -108,5 +108,5 @@ export async function saveBotStateSnapshot(
         }
     }
 
-    await supabaseService.saveBotStateSnapshot(ownerId, state);
+    await saveLegacyBotStateSnapshot(ownerId, state);
 }
diff --git a/backend/src/services/strategyPresetRepository.ts b/backend/src/services/strategyPresetRepository.ts
index 3837867..ec51d4d 100644
--- a/backend/src/services/strategyPresetRepository.ts
+++ b/backend/src/services/strategyPresetRepository.ts
@@ -2,7 +2,7 @@ import { getContainer } from '@bytelyst/cosmos';
 import { randomUUID } from 'node:crypto';
 import { config } from '../config/index.js';
 import logger from '../utils/logger.js';
-import { supabaseService } from './SupabaseService.js';
+import { getLegacySupabaseClient } from './legacySupabaseClient.js';
 
 const PRESET_CONTAINER = 'strategy_presets';
 
@@ -19,7 +19,7 @@ function isCosmosConfigured(): boolean {
 }
 
 function getLegacyClient() {
-    return supabaseService.getClient();
+    return getLegacySupabaseClient();
 }
 
 export async function listStrategyPresets(): Promise<any[]> {
diff --git a/backend/src/services/userRepository.ts b/backend/src/services/userRepository.ts
index d61c386..3d8b2db 100644
--- a/backend/src/services/userRepository.ts
+++ b/backend/src/services/userRepository.ts
@@ -1,7 +1,7 @@
 import { getContainer } from '@bytelyst/cosmos';
 import { config } from '../config/index.js';
 import logger from '../utils/logger.js';
-import { supabaseService } from './SupabaseService.js';
+import { getLegacySupabaseClient } from './legacySupabaseClient.js';
 import type { UserConfig } from './tradingUserTypes.js';
 
 const USER_PROFILE_CONTAINER = 'trading_users';
@@ -63,7 +63,7 @@ export async function listActiveTradingUsers(): Promise<UserConfig[]> {
         }
     }
 
-    const client = supabaseService.getClient();
+    const client = getLegacySupabaseClient();
     if (!client) {
         return [];
     }