Show free space in system tray tooltip (#309)

The tray tooltip now lists free space per profile, including the last
known value restored from config while sync is stopped, so the GUI
window does not need to be opened to check it.

Tray tooltips are rendered by the desktop environment at a fixed narrow
width that the application cannot widen, and profile names (often email
addresses) use most of it. The tooltip was restructured so each value
gets its own short line indented under the profile name, with profiles
separated by blank lines - lines no longer wrap mid-value and
multi-profile listings stay readable.

Also removed leftover src/ui/ from the pre-packaging layout (empty file
from a mistargeted uic run and stale __pycache__).

Closes #309

src/onedrive_gui/main_window.py

@@ -600,9 +600,13 @@ class MainWindow(QMainWindow, Ui_MainWindow):
             if profile_name in self.profile_status_pages:
                 status_msg = self.profile_status_pages[profile_name].label_onedrive_status.text()
                 error_tooltip = self.profile_status_pages[profile_name].label_error_icon.toolTip()
+                # Label holds the live value while sync runs, or the last known
+                # value restored from global_config on startup.
+                free_space = self.profile_status_pages[profile_name].label_free_space.text()
             else:
                 status_msg = ""
                 error_tooltip = ""
+                free_space = ""
 
             # Categorize this profile's state
             if not is_running:
@@ -625,7 +629,7 @@ class MainWindow(QMainWindow, Ui_MainWindow):
                 profile_state = "STOPPED"
                 has_stopped = True
 
-            profile_statuses[profile_name] = {"state": profile_state, "status_msg": status_msg if status_msg else "stopped", "is_running": is_running}
+            profile_statuses[profile_name] = {"state": profile_state, "status_msg": status_msg if status_msg else "stopped", "is_running": is_running, "free_space": free_space}
 
         # Determine overall state with priority
         if has_error:
@@ -642,43 +646,36 @@ class MainWindow(QMainWindow, Ui_MainWindow):
     def generate_tray_tooltip(self, overall_state, running_count, total_count, profile_statuses):
         """
         Generate detailed tooltip showing status of all profiles.
+
+        The tooltip window is rendered by the desktop environment at a fixed
+        narrow width - the application cannot make it wider - and long profile
+        names (e.g. email addresses) already use most of that width. Each value
+        therefore gets its own short indented line under the profile name, so
+        the free space (#309) and status never wrap away from their meaning.
+        Profiles are separated by blank lines so multi-profile listings stay
+        scannable.
         """
         if not profile_statuses:
             return "OneDriveGUI - No profiles configured"
 
-        # Summary line
-        if running_count == total_count and overall_state != "ERROR":
-            summary = f"All {total_count} profile(s) running"
-        elif running_count == 0:
-            summary = f"All {total_count} profile(s) stopped"
-        else:
-            summary = f"{running_count} of {total_count} profile(s) running"
-
-        # Add overall state indicator
+        state_tags = {"ERROR": "[ERROR]", "STOPPED": "[STOPPED]", "SYNCING": "[SYNCING]", "IDLE": "[IDLE]"}
         state_indicators = {"ERROR": "Sync error detected", "STOPPED": "Sync stopped", "SYNCING": "Syncing...", "IDLE": "All syncs complete"}
-        summary += f" - {state_indicators.get(overall_state, '')}"
+        lines = [f"{running_count}/{total_count} profile(s) running - {state_indicators.get(overall_state, '')}"]
 
-        # Build detailed list
-        lines = [summary, ""]
         for profile_name, status_info in profile_statuses.items():
-            state = status_info["state"]
+            # Each profile is its own block, separated by a blank line
+            lines.append("")
+            lines.append(f"{profile_name} {state_tags.get(status_info['state'], '[IDLE]')}")
+
+            free_space = status_info.get("free_space", "")
+            if free_space and free_space != "Not Available":
+                lines.append(f"  Free: {free_space}")
+
             status_msg = status_info["status_msg"]
-
-            # Add text indicator for each profile
-            if state == "ERROR":
-                indicator = "[ERROR]"
-            elif state == "STOPPED":
-                indicator = "[STOPPED]"
-            elif state == "SYNCING":
-                indicator = "[SYNCING]"
-            else:
-                indicator = "[IDLE]"
-
-            # Shorten status message if too long
-            if len(status_msg) > 50:
-                status_msg = status_msg[:47] + "..."
-
-            lines.append(f"{indicator} {profile_name}: {status_msg}")
+            if status_msg and status_msg != "stopped":
+                if len(status_msg) > 40:
+                    status_msg = status_msg[:37] + "..."
+                lines.append(f"  {status_msg}")
 
         return "\n".join(lines)