Claude CLI v2.1.69 hangs silently when spawned via child_process.spawn()
with piped stdio (known bug github.com/anthropics/claude-code/issues/6775).
Replace raw CLI spawning in both sidecar runners with the SDK's query()
function, which handles subprocess management internally. SDK message
format matches CLI stream-json, so the sdk-messages.ts adapter is
unchanged.
- agent-runner.ts: use SDK query() with AbortController for stop
- agent-runner-deno.ts: use npm:@anthropic-ai/claude-agent-sdk import
- sidecar.rs: add --allow-write and --allow-net Deno permissions
- package.json: add @anthropic-ai/claude-agent-sdk ^0.2.70, build:sidecar script
Create Cargo workspace at v2/ level with members: src-tauri,
bterminal-core, bterminal-relay. Extract PtyManager and SidecarManager
into shared bterminal-core crate with EventSink trait for abstracting
event emission. TauriEventSink wraps AppHandle. src-tauri pty.rs and
sidecar.rs become thin re-exports. Move Cargo.lock to workspace root.
Add v2/target/ to .gitignore.
