diff --git a/reports-app/telegram-bot/app/api/client.py b/reports-app/telegram-bot/app/api/client.py
index dac3a72..ed37c33 100644
--- a/reports-app/telegram-bot/app/api/client.py
+++ b/reports-app/telegram-bot/app/api/client.py
@@ -131,7 +131,7 @@ class BackendAPIClient:
                 jwt_token = result['access_token']
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             # Flow A: Auto-linking (no password required)
@@ -170,7 +170,7 @@ class BackendAPIClient:
             str: New JWT access token, None if failed
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             response = await self.client.post(
@@ -199,7 +199,7 @@ class BackendAPIClient:
             httpx.HTTPError: On network or HTTP errors
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             response = await self.client.post(
@@ -247,7 +247,7 @@ class BackendAPIClient:
             httpx.HTTPError: On network or HTTP errors
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             response = await self.client.post(
@@ -309,7 +309,7 @@ class BackendAPIClient:
             List of company dicts with id, nume_firma, cui, etc.
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             response = await self.client.get(
@@ -350,7 +350,7 @@ class BackendAPIClient:
             Includes _cache_hit and _response_time_ms metadata
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             # Add cache metadata header for Telegram Bot
@@ -385,7 +385,7 @@ class BackendAPIClient:
             Dict with treasury breakdown data (accounts by type)
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             # Add cache metadata header for Telegram Bot
@@ -421,7 +421,7 @@ class BackendAPIClient:
             Dict with detailed data (list of clients/suppliers with balances)
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             # Add cache metadata header for Telegram Bot
@@ -457,7 +457,7 @@ class BackendAPIClient:
             Dict with maturity data (in_term, overdue, total)
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             # Add cache metadata header for Telegram Bot
@@ -491,7 +491,7 @@ class BackendAPIClient:
             Dict with performance data (incasari_total, plati_total, net)
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             # Add cache metadata header for Telegram Bot
@@ -527,7 +527,7 @@ class BackendAPIClient:
             Dict with monthly flows (months, incasari, plati arrays)
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             # Add cache metadata header for Telegram Bot
@@ -563,7 +563,7 @@ class BackendAPIClient:
             Dict with trends data including periods, clienti_incasat, furnizori_achitat arrays
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             # Add cache metadata header for Telegram Bot
@@ -611,7 +611,7 @@ class BackendAPIClient:
             List of invoice dicts
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             params = {"company": company_id}
@@ -656,7 +656,7 @@ class BackendAPIClient:
             Dict with summary (total_count, total_amount, paid, unpaid, etc.)
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             response = await self.client.get(
@@ -694,7 +694,7 @@ class BackendAPIClient:
             Dict with treasury data (cash_balance, incoming, outgoing, etc.)
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             response = await self.client.get(
@@ -739,7 +739,7 @@ class BackendAPIClient:
             bytes: File content, None if failed
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             request_data = {
@@ -784,7 +784,7 @@ class BackendAPIClient:
             bool: True if successful
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             request_data = {}
@@ -823,7 +823,7 @@ class BackendAPIClient:
             bool: True if successful
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             response = await self.client.post(
@@ -854,7 +854,7 @@ class BackendAPIClient:
             Dict with cache stats including 'user_enabled' field
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             response = await self.client.get(
@@ -881,7 +881,7 @@ class BackendAPIClient:
             bool: True if backend is healthy
         """
         try:
-            if not self.client:
+            if not self.client or self.client.is_closed:
                 self.client = AsyncClient(base_url=self.base_url, timeout=REQUEST_TIMEOUT)
 
             response = await self.client.get("/api/telegram/health")