v1.8.57: auto-size result columns + working horizontal scrollbar

- Measure column widths from header and data (sample up to 100 rows)
- Clamp width: min 60px, max 400px per column
- Set stretch=False so columns don't compress to fit viewport
- Horizontal scrollbar now works when total column width exceeds view

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

gui/tabs/query_tab.py

@@ -650,7 +650,7 @@ class QueryTab(ctk.CTkFrame):
     # ── Results Treeview population ────────────────────────────────
 
     def _populate_results(self, columns: list[str], rows: list[list]):
-        """Clear and populate the results Treeview."""
+        """Clear and populate the results Treeview with auto-sized columns."""
         self._results_tree.delete(*self._results_tree.get_children())
 
         if not columns:
@@ -658,9 +658,28 @@ class QueryTab(ctk.CTkFrame):
             return
 
         self._results_tree["columns"] = columns
-        for col in columns:
+
+        # Measure optimal width per column: max(header, data) + padding
+        import tkinter.font as tkfont
+        heading_font = tkfont.Font(family="Segoe UI", size=10, weight="bold")
+        data_font = tkfont.Font(family="Consolas", size=11)
+
+        col_widths = []
+        for i, col in enumerate(columns):
+            max_w = heading_font.measure(col) + 20  # header + sort arrow space
+            # Sample up to 100 rows to avoid slow measuring on huge result sets
+            for row in rows[:100]:
+                val = str(row[i]) if i < len(row) and row[i] is not None else "NULL"
+                w = data_font.measure(val) + 16  # data + padding
+                if w > max_w:
+                    max_w = w
+            # Clamp: min 60px, max 400px
+            col_widths.append(max(60, min(400, max_w)))
+
+        for col, width in zip(columns, col_widths):
             self._results_tree.heading(col, text=col, anchor="w")
-            self._results_tree.column(col, width=120, minwidth=60, anchor="w")
+            self._results_tree.column(col, width=width, minwidth=60,
+                                      anchor="w", stretch=False)
 
         for row in rows:
             display = [str(v) if v is not None else "NULL" for v in row]

version.py

@@ -1,6 +1,6 @@
 """Version info for ServerManager."""
 
-__version__ = "1.8.56"
+__version__ = "1.8.57"
 __app_name__ = "ServerManager"
 __author__ = "aibot777"
 __description__ = "Desktop GUI for managing remote servers"