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, 2 insertions, 7 deletions

diff --git a/packages/core/src/credentials/opencode.ts b/packages/core/src/credentials/opencode.ts
index b8a9d4d..d4d4851 100644
--- a/packages/core/src/credentials/opencode.ts
+++ b/packages/core/src/credentials/opencode.ts
@@ -70,9 +70,7 @@ function parseOcBucket(
 	return { utilization, resetsAt };
 }
 
-export async function fetchOpencodeUsage(
-	keyId: string,
-): Promise<OpencodeUsageReport | null> {
+export async function fetchOpencodeUsage(keyId: string): Promise<OpencodeUsageReport | null> {
 	const cookie = resolveApiKey("opencode-cookie");
 	const wsId = getWorkspaceId(keyId);
 
@@ -96,10 +94,7 @@ export async function fetchOpencodeUsage(
 		const html = await response.text();
 
 		// Auth redirect check
-		if (
-			html.includes("/auth/authorize") ||
-			html.includes('window.location="/auth/authorize"')
-		) {
+		if (html.includes("/auth/authorize") || html.includes('window.location="/auth/authorize"')) {
 			return null;
 		}