Fix pandas DataFrame indexing in project selection

Use df.iloc[row, col] instead of df[row][col] for proper pandas access.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/ui/pages/projects_page.py

@@ -180,8 +180,8 @@ def create_projects_page(
 
             row = evt.index[0]
             if row < len(df):
-                project_id = df[row][0]
-                project_name = df[row][1]
+                project_id = df.iloc[row, 0]
+                project_name = df.iloc[row, 1]
                 return project_id, f"### {project_name}"
 
             return None, "### Select a project"