feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- System prompt injection for routing
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

packages/web/src/components/share/content-error.tsx

@@ -0,0 +1,25 @@
+import style from "./content-error.module.css"
+import { type JSX, createSignal } from "solid-js"
+import { createOverflow, useShareMessages } from "./common"
+
+interface Props extends JSX.HTMLAttributes<HTMLDivElement> {
+  expand?: boolean
+}
+export function ContentError(props: Props) {
+  const [expanded, setExpanded] = createSignal(false)
+  const overflow = createOverflow()
+  const messages = useShareMessages()
+
+  return (
+    <div class={style.root} data-expanded={expanded() || props.expand === true ? true : undefined}>
+      <div data-section="content" ref={overflow.ref}>
+        {props.children}
+      </div>
+      {((!props.expand && overflow.status) || expanded()) && (
+        <button type="button" data-element-button-text onClick={() => setExpanded((e) => !e)}>
+          {expanded() ? messages.show_less : messages.show_more}
+        </button>
+      )}
+    </div>
+  )
+}