feat: message queue/interrupt system, CORS fix, mobile fixes, chat splitting

- Add message queue allowing users to send messages while agent is running
- Queue messages are injected into tool results as [USER INTERRUPT]
- Retrieve tool interrupted via Promise.race when user message arrives
- Queued messages show with 'queued' badge and cancel button
- Consumed messages repositioned and chat splits at interrupt point
- New assistant message block created after interrupt for clean flow
- Add POST /chat/cancel endpoint for cancelling queued messages
- Fix CORS to allow any origin (Tailscale/LAN access)
- Fix crypto.randomUUID fallback for non-secure contexts (HTTP)
- Fix frontend API URL derivation from page hostname
- Auto-create DB tab if missing on processMessage (foreign key fix)
- Add error logging to processMessage catch block
- Fix working directory input sync on agent switch
- Fix agent mode button to re-apply agent settings

1 files changed, 11 insertions, 1 deletions

diff --git a/packages/frontend/src/lib/config.ts b/packages/frontend/src/lib/config.ts
index c8f4d9f..0565367 100644
--- a/packages/frontend/src/lib/config.ts
+++ b/packages/frontend/src/lib/config.ts
@@ -1,5 +1,15 @@
 const STORAGE_KEY = "dispatch-api-url";
-const DEFAULT_API_BASE = import.meta.env.VITE_API_URL ?? "http://localhost:3000";
+
+function getDefaultApiBase(): string {
+	if (import.meta.env.VITE_API_URL) return import.meta.env.VITE_API_URL;
+	// Derive from current page hostname so it works over Tailscale/LAN
+	if (typeof window !== "undefined" && window.location.hostname !== "localhost") {
+		return `http://${window.location.hostname}:3000`;
+	}
+	return "http://localhost:3000";
+}
+
+const DEFAULT_API_BASE = getDefaultApiBase();
 
 function loadApiBase(): string {
 	if (typeof localStorage !== "undefined") {