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/app/src/components/session/index.ts

@@ -0,0 +1,6 @@
+export { SessionHeader } from "./session-header"
+export { SessionContextTab } from "./session-context-tab"
+export { SortableTab, FileVisual } from "./session-sortable-tab"
+export { SortableTerminalTab } from "./session-sortable-terminal-tab"
+export { NewSessionView } from "./session-new-view"
+export { NewSessionDesignView } from "./session-new-design-view"