Rename orchestrator UI label to operator

[edwin-zvs]

Summary

• rename the user-facing orchestrator label from god to operator in the web session list
• update TUI minibuffer hints from C-x x god to C-x x operator
• keep internal SessionKind::Orchestrator naming unchanged
• add web smoke coverage that the orchestrator row renders as operator and remains pinned first

Validation

• node script parse check for the inline web UI script
• cargo build -p agentd -p agentd-cli
• cargo test -p agentd-e2e web_client_loads_and_websocket_connects -- --nocapture
• cargo build
• git diff --check

Built debug binaries

• /Users/moon/agentd/.claude/worktrees/rename-god-operator/target/debug/agent
• /Users/moon/agentd/.claude/worktrees/rename-god-operator/target/debug/agentd
• /Users/moon/agentd/.claude/worktrees/rename-god-operator/target/debug/agentd-mcp
• /Users/moon/agentd/.claude/worktrees/rename-god-operator/target/debug/agentd-adapter-antigravity
• /Users/moon/agentd/.claude/worktrees/rename-god-operator/target/debug/agentd-adapter-claude
• /Users/moon/agentd/.claude/worktrees/rename-god-operator/target/debug/agentd-adapter-codex
• /Users/moon/agentd/.claude/worktrees/rename-god-operator/target/debug/agentd-adapter-shell
• /Users/moon/agentd/.claude/worktrees/rename-god-operator/target/debug/agentd-adapter-zarvis

Relevant binaries: this PR changes web UI assets in agentd and TUI labels in agent.