web: integrate QoL slices 1-5 (model switch/rename, history deletes, usage stats, repo prepare+badges+imageUsed, markdown/search/FAB/timestamps) — 263 tests, ≥95% all metrics

web/src/derive.ts

@@ -40,6 +40,10 @@ export interface ChatMessage {
 	toolCalls: { id: string; name: string; argsJson: string }[];
 	toolCallId: string | null;
 	streaming: boolean;
+	/** envelope ts of the persisted message_end (0 while streaming) */
+	ts: number;
+	/** true for daemon/plugin error notices: rendered as a notice line, not a chat bubble */
+	notice?: boolean;
 }
 
 export interface ChatDerivation {
@@ -128,10 +132,24 @@ export function deriveChat(events: EventFrame[]): ChatDerivation {
 						toolCalls: m.toolCalls ?? [],
 						toolCallId: m.toolCallId,
 						streaming: false,
+						ts: e.ts ?? 0,
 					});
 				}
 				break;
 			}
+			case "error_notice":
+				messages.push({
+					key: `notice-${e.seq}`,
+					role: "system",
+					text: e.reason ?? "unknown error",
+					thinking: null,
+					toolCalls: [],
+					toolCallId: null,
+					streaming: false,
+					ts: e.ts ?? 0,
+					notice: true,
+				});
+				break;
 			default:
 				break;
 		}
@@ -146,6 +164,7 @@ export function deriveChat(events: EventFrame[]): ChatDerivation {
 			toolCalls: [],
 			toolCallId: null,
 			streaming: true,
+			ts: 0,
 		});
 	}