From 19b6b29b1a82b11c64c8b05c97cf8f687fd495f6 Mon Sep 17 00:00:00 2001
From: Adam Malczewski <github@tradam.dev>
Date: Sat, 27 Jun 2026 19:04:26 +0900
Subject: feat(concurrency): loading-ring for queued chats (CR-13 consumed)
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Backend shipped "queued" ConversationStatus (additive to wire@0.12.0): when a
request blocks on a concurrency slot, conversation.statusChanged broadcasts
"queued" (broadcast-only, never persisted); "active" on slot grant.

FE consumes it:
- WS parser (adapters/ws/logic.ts): accepts "queued" in the status set.
- Store handler: "queued" updates the status map + opens a tab for a new
  cross-device queued conversation (like "active").
- TabList: status === "queued" -> loading-ring (spinner, aria-label "Queued");
  "active" -> loading-dots (unchanged).
- Composer: status type widened to ComposerStatus (idle|running|queued|error),
  exported from features/chat. "queued" -> a loading-ring status icon +
  placeholder "Queued for a slot…"; behaves like "running" for the send
  button (steer/stop — the turn is in flight, just waiting for a slot).
- App.svelte: composerStatus derived (error > queued > running > idle) —
  conversationStatus === "queued" wins over generating so the corner shows a
  ring during the wait (turn-start fires before the slot is granted, so
  generating is already true while status === "queued").
- Re-mirrored .dispatch/wire.reference.md (ConversationStatus widened + header).

Tests: WS parser accepts queued; store handler sets status + opens a cross-device
tab + transitions queued->active->idle; TabList renders a ring for queued + dots
for active. typecheck 0/0, 925 tests green (x2), biome clean, build OK.
backend-handoff.md CR-13 marked RESOLVED.
---
 src/features/tabs/ui/TabList.svelte | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'src/features/tabs/ui')

diff --git a/src/features/tabs/ui/TabList.svelte b/src/features/tabs/ui/TabList.svelte
index b1190e4..76e1968 100644
--- a/src/features/tabs/ui/TabList.svelte
+++ b/src/features/tabs/ui/TabList.svelte
@@ -144,7 +144,14 @@
 						{tab.title}
 					</span>
 				{/if}
-				{#if statusFor?.(tab.conversationId) === "active"}
+				{#if statusFor?.(tab.conversationId) === "queued"}
+					<!-- Waiting for a concurrency slot — a ring (vs the dots of `active`). -->
+					<span
+						class="loading loading-spinner loading-xs shrink-0 text-primary"
+						aria-label="Queued"
+						title="Waiting for a concurrency slot"
+					></span>
+				{:else if statusFor?.(tab.conversationId) === "active"}
 					<span class="loading loading-dots loading-xs shrink-0 text-primary"></span>
 				{/if}
 				<button
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