storkit: merge 387_story_configurable_base_branch_name_in_project_toml

.storkit/project.toml

@@ -13,6 +13,11 @@ max_coders = 3
 # Set to 0 to disable retry limits.
 max_retries = 2
 
+# Base branch name for this project. Worktree creation, merges, and agent prompts
+# use this value for {{base_branch}}. When not set, falls back to auto-detection
+# (reads current HEAD branch).
+base_branch = "master"
+
 [[component]]
 name = "frontend"
 path = "frontend"