chore: mark tty/adapter, tty-local/pty-mode, tty-local/pipe-mode as completed

tasks/tty-local/pipe-mode.md

@@ -1,7 +1,7 @@
 ---
 id: tty-local/pipe-mode
 name: Implement pipe mode (tokio::process, PipeControl, ADR-056 kill guard)
-status: pending
+status: completed
 depends_on: [tty-local/crate-init]
 scope: moderate
 risk: medium

tasks/tty-local/pty-mode.md

@@ -1,7 +1,7 @@
 ---
 id: tty-local/pty-mode
 name: Implement PTY mode (three-thread bridge, PtyControl, REQ-TTY-02, ADR-056 kill guard)
-status: pending
+status: completed
 depends_on: [tty-local/crate-init]
 scope: broad
 risk: high

tasks/tty/adapter.md

@@ -1,7 +1,7 @@
 ---
 id: tty/adapter
 name: Implement TtyAdapter (ProtocolHandler) and three-pump session driver
-status: pending
+status: completed
 depends_on: [tty/wire-codec, tty/control-messages, tty/negotiation, tty/backend-trait]
 scope: broad
 risk: high