fix: show actual working directory, not derived fallback

The Working directory field was confusing because it showed:
- derivedPath (workspace + repo name) even when NOT actually set
- This made it look like a directory was selected when it wasn't

Now it shows:
- The ACTUAL repoPath from taskState (what's really stored)
- Empty with placeholder "Not set - click Run to select" if nothing is set
- Clear button only shows when directory is actually set

This makes it crystal clear:
- What directory will ACTUALLY be used
- Whether you need to select one or not

Much clearer UX!

Author: lucasheriques

src/renderer/features/task-detail/components/TaskDetailPanel.tsx

@@ -90,8 +90,6 @@ export function TaskDetailPanel({ taskId, task }: TaskDetailPanelProps) {
                 ? { status: execution.state.progress.status }
                 : undefined
             }
-            derivedPath={taskData.derivedPath}
-            defaultWorkspace={taskData.defaultWorkspace}
           />
         </Flex>
 

src/renderer/features/task-detail/components/TaskMetadata.tsx

@@ -19,17 +19,14 @@ import type React from "react";
 interface TaskMetadataProps {
   task: Task;
   progress?: { status: string };
-  derivedPath: string | null;
-  defaultWorkspace: string | null;
 }
 
 export const TaskMetadata: React.FC<TaskMetadataProps> = ({
   task,
   progress,
-  derivedPath,
-  defaultWorkspace,
 }) => {
-  const { setRepoPath, revalidateRepo } = useTaskExecutionStore();
+  const { setRepoPath, revalidateRepo, getTaskState } = useTaskExecutionStore();
+  const taskState = getTaskState(task.id);
 
   const handleWorkingDirectoryChange = async (newPath: string) => {
     setRepoPath(task.id, newPath);
@@ -91,17 +88,13 @@ export const TaskMetadata: React.FC<TaskMetadataProps> = ({
             <Flex gap="2" align="center" width="100%">
               <Box style={{ flex: 1, minWidth: 0 }}>
                 <FolderPicker
-                  value={derivedPath || ""}
+                  value={taskState.repoPath || ""}
                   onChange={handleWorkingDirectoryChange}
-                  placeholder={
-                    !defaultWorkspace
-                      ? "No workspace configured"
-                      : "Select working directory..."
-                  }
+                  placeholder="Not set - click Run to select"
                   size="2"
                 />
               </Box>
-              {derivedPath && (
+              {taskState.repoPath && (
                 <Tooltip content="Clear directory selection">
                   <IconButton
                     size="2"