feat: agent builder, CWD support, auto-save, UI polish, unavailable tool handling

- Agent Builder: full CRUD with card grid, drag-and-drop model reorder, edit/delete
- Auto-save on edit with 600ms debounce, AbortController for concurrency, fieldset disabled until name entered
- Agent definitions stored as TOML with cwd field, loaded from global/project dirs
- Working directory: per-tab CWD override in Chat Settings, agent default CWD, auto-create on first message
- CWD validation: check-dir endpoint with ~ expansion, real-time validity indicator
- Subagent CWD validated against parent's effective CWD using path.relative
- Unavailable tool calls: caught gracefully, shown as tool call with error badge, model retries
- UI: tab bar border radius, sidebar border removed, chat input ghost style, scroll-to-bottom rectangle
- Skills dir collapse uses CSS rotation, Model Choice renamed to Chat Settings, System Prompt view removed
- Reusable SkillsBrowser/ToolPermissions with external mode for Agent Builder
- ModelSelector: Agent/Manual toggle, agent list, Agent Settings link
- Page router, skills recursive scanning, bin/up gopass removed, docker volume mounts

1 files changed, 0 insertions, 11 deletions

diff --git a/packages/frontend/src/lib/components/TaskListPanel.svelte b/packages/frontend/src/lib/components/TaskListPanel.svelte
index d70373f..17ade55 100644
--- a/packages/frontend/src/lib/components/TaskListPanel.svelte
+++ b/packages/frontend/src/lib/components/TaskListPanel.svelte
@@ -29,17 +29,6 @@ function isChecked(status: TaskItem["status"]): boolean {
 function isIndeterminate(status: TaskItem["status"]): boolean {
 	return status === "in_progress";
 }
-
-function statusLabel(status: TaskItem["status"]): string {
-	switch (status) {
-		case "pending":
-			return "Pending";
-		case "in_progress":
-			return "In progress";
-		case "done":
-			return "Done";
-	}
-}
 </script>
 
 <div class="flex flex-col gap-2">