Display response size in the status line

src/http_client.py

@@ -153,15 +153,24 @@ class HttpClient:
         # Format headers in HTTPie-style output (HTTP/1.1 200 OK\nHeader: value\n...)
         headers_text = self._format_headers(msg, status_code, status_text)
 
+        # Get raw body data for size calculation
+        body_bytes = bytes_data.get_data()
+
+        # Calculate total response size (headers + body)
+        headers_size = len(headers_text.encode('utf-8'))
+        body_size = len(body_bytes)
+        total_size = headers_size + body_size
+
         # Decode body with error handling
-        body = bytes_data.get_data().decode('utf-8', errors='replace')
+        body = body_bytes.decode('utf-8', errors='replace')
 
         return HttpResponse(
             status_code=status_code,
             status_text=status_text,
             headers=headers_text,
             body=body.strip(),
-            response_time_ms=response_time
+            response_time_ms=response_time,
+            response_size_bytes=total_size
         )
 
     def _format_headers(self, msg: Soup.Message, status_code: int, status_text: str) -> str:

src/models.py

@@ -52,6 +52,7 @@ class HttpResponse:
     headers: str  # Raw header text from libsoup3
     body: str  # Raw body text
     response_time_ms: float
+    response_size_bytes: int = 0  # Total response size in bytes
 
     def to_dict(self):
         """Convert to dictionary for JSON serialization."""

src/request_tab_widget.py

@@ -372,6 +372,9 @@ class RequestTabWidget(Gtk.Box):
         self.time_label = Gtk.Label(label="")
         status_box.append(self.time_label)
 
+        self.size_label = Gtk.Label(label="")
+        status_box.append(self.size_label)
+
         # Spacer
         spacer = Gtk.Box()
         spacer.set_hexpand(True)
@@ -901,6 +904,10 @@ class RequestTabWidget(Gtk.Box):
         time_text = f"{response.response_time_ms:.0f} ms"
         self.time_label.set_text(time_text)
 
+        # Update size
+        size_text = self._format_size(response.response_size_bytes)
+        self.size_label.set_text(size_text)
+
         # Update response headers
         buffer = self.response_headers_textview.get_buffer()
         buffer.set_text(response.headers)
@@ -921,6 +928,7 @@ class RequestTabWidget(Gtk.Box):
         """Display error in this tab's UI."""
         self.status_label.set_text("Error")
         self.time_label.set_text("")
+        self.size_label.set_text("")
 
         # Clear response headers
         buffer = self.response_headers_textview.get_buffer()
@@ -1179,6 +1187,20 @@ class RequestTabWidget(Gtk.Box):
 
         return body
 
+    def _format_size(self, size_bytes):
+        """Format size in bytes to human-readable format (B, KB, MB, GB)."""
+        if size_bytes < 1024:
+            return f"{size_bytes} B"
+        elif size_bytes < 1024 * 1024:
+            size_kb = size_bytes / 1024
+            return f"{size_kb:.1f} KB"
+        elif size_bytes < 1024 * 1024 * 1024:
+            size_mb = size_bytes / (1024 * 1024)
+            return f"{size_mb:.1f} MB"
+        else:
+            size_gb = size_bytes / (1024 * 1024 * 1024)
+            return f"{size_gb:.1f} GB"
+
     def _build_environment_selector_inline(self, container):
         """Build environment selector and add to container."""
         if not self.project_id: