Show epic progress count instead of Epic label and checkbox

Changed epic display in tree view from:
  t-PpXWsU [Epic] [ ] Task Manager Improvements

To:
  t-PpXWsU [6/11] Task Manager Improvements

The [6/11] shows completed/total child tasks, giving immediate visual
feedback on epic progress. Regular tasks still use checkbox indicators:
[ ] open, [~] in-progress, [✓] done.

1 files changed, 14 insertions, 12 deletions

diff --git a/Omni/Task/Core.hs b/Omni/Task/Core.hs
index b322ea9..0351cf4 100644
--- a/Omni/Task/Core.hs
+++ b/Omni/Task/Core.hs
@@ -279,28 +279,30 @@ showTaskTree maybeId = do
     printTreeNode :: [Task] -> Task -> Int -> IO ()
     printTreeNode allTasks task indent = do
       let prefix = T.pack (replicate (indent * 2) ' ')
-          -- Only show type label for epics
-          typeStr = case taskType task of
-            Epic -> "[Epic] "
-            WorkTask -> ""
-          statusStr = case taskStatus task of
-            Open -> "[ ]"
-            InProgress -> "[~]"
-            Done -> "[✓]"
+          children = filter (\t -> taskParent t == Just (taskId task)) allTasks
+          -- For epics, show progress count [completed/total]; for tasks, show status checkbox
+          statusStr = case taskType task of
+            Epic ->
+              let total = length children
+                  completed = length <| filter (\t -> taskStatus t == Done) children
+               in "[" <> T.pack (show completed) <> "/" <> T.pack (show total) <> "]"
+            WorkTask -> case taskStatus task of
+              Open -> "[ ]"
+              InProgress -> "[~]"
+              Done -> "[✓]"
           nsStr = case taskNamespace task of
             Nothing -> ""
             Just ns -> "[" <> ns <> "] "
           -- Calculate available width for title (80 cols - prefix - id - labels)
-          usedWidth = T.length prefix + T.length (taskId task) + T.length typeStr + T.length statusStr + T.length nsStr + 2
+          usedWidth = T.length prefix + T.length (taskId task) + T.length statusStr + T.length nsStr + 2
           availableWidth = max 20 (80 - usedWidth)
           truncatedTitle =
             if T.length (taskTitle task) > availableWidth
               then T.take (availableWidth - 3) (taskTitle task) <> "..."
               else taskTitle task
-      putText <| prefix <> taskId task <> " " <> typeStr <> statusStr <> " " <> nsStr <> truncatedTitle
+      putText <| prefix <> taskId task <> " " <> statusStr <> " " <> nsStr <> truncatedTitle
 
-      -- Find and print children (tasks with this task as parent)
-      let children = filter (\t -> taskParent t == Just (taskId task)) allTasks
+      -- Print children
       traverse_ (\child -> printTreeNode allTasks child (indent + 1)) children
 
 -- Helper to print a task