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/tui/src/context/clipboard.tsx

@@ -0,0 +1,18 @@
+import { createContext, type JSX, useContext } from "solid-js"
+import { read, write } from "../clipboard"
+
+export type ClipboardContent = Readonly<{ data: string; mime: string }>
+export type ClipboardService = Readonly<{
+  read?(): Promise<ClipboardContent | undefined>
+  write?(text: string): Promise<void>
+}>
+const clipboard = { read, write }
+const ClipboardContext = createContext<ClipboardService>(clipboard)
+
+export function ClipboardProvider(props: { value?: ClipboardService; children: JSX.Element }) {
+  return <ClipboardContext.Provider value={props.value ?? clipboard}>{props.children}</ClipboardContext.Provider>
+}
+
+export function useClipboard() {
+  return useContext(ClipboardContext)
+}