feat: forward agent style via native CLI config and terminal title

Replace prompt-injection for display identity with native UI wiring:
- Claude: writes a statusline shell script + custom theme JSON, wired up
  via settings.json so label/color show in the status bar and theme
- Codex: writes [tui] block into codex-config.toml (status_line,
  terminal_title, dark-ansi theme)
- Both backends set the terminal title via ANSI OSC 0 escape before
  exec-ing the agent when a label is present

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bot_bottle/backend/docker/bottle.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import subprocess
+import shlex
 from typing import Callable
 
 from typing import cast
@@ -22,12 +23,14 @@ class DockerBottle(Bottle):
         *,
         agent_command: str = "claude",
         agent_prompt_mode: PromptMode = "append_file",
+        terminal_title: str = "",
     ):
         self.name = container
         self._teardown = teardown
         self.prompt_path = prompt_path_in_container
         self._agent_prompt_mode = agent_prompt_mode
         self.agent_command = agent_command
+        self.terminal_title = terminal_title
         self.agent_provider_template = (
             "codex" if agent_command == "codex" else "claude"
         )
@@ -47,9 +50,14 @@ class DockerBottle(Bottle):
         return cmd
 
     def exec_agent(self, argv: list[str], *, tty: bool = True) -> int:
-        return subprocess.run(
-            self.agent_argv(argv, tty=tty), check=False,
-        ).returncode
+        agent_argv = self.agent_argv(argv, tty=tty)
+        if self.terminal_title and tty:
+            shell_script = (
+                f"printf '\\033]0;%s\\007' {shlex.quote(self.terminal_title)}; "
+                f"exec {shlex.join(agent_argv)}"
+            )
+            return subprocess.run(["sh", "-lc", shell_script], check=False).returncode
+        return subprocess.run(agent_argv, check=False).returncode
 
     def exec(self, script: str, *, user: str = "node") -> ExecResult:
         # Pipe via stdin to `sh -s` so the caller never has to worry

bot_bottle/backend/docker/launch.py

@@ -175,6 +175,7 @@ def launch(
             None,
             agent_command=plan.agent_command,
             agent_prompt_mode=plan.agent_prompt_mode,
+            terminal_title=plan.spec.label or plan.spec.agent_name,
         )
         bottle.prompt_path = provision(plan, bottle)