fix: replace legacy clawdbot -c RPC with gateway agent calls

[HonzysClawdbot]

Problem

Spawning an agent fails with:

Command failed (clawdbot -c sessions_spawn(...)): error: unknown option '-c'

The clawdbot binary no longer exists and openclaw doesn't support the -c flag.

Solution

Added runGatewayToolCall() helper in src/lib/command.ts that invokes agent tools via openclaw gateway call agent --expect-final. Replaced all runClawdbot(['-c', rpcFn]) calls across:

• POST /api/spawn — sessions_spawn
• POST /api/sessions — session_setThinking/setVerbose/setReasoning/setLabel
• DELETE /api/sessions — session_delete
• POST /api/sessions/[id]/control — sessions_kill/sessions_send
• GET /api/status — removed clawdbot --version fallback

Closes #401

[0xNyk]

Review

The migration from clawdbot -c to callOpenClawGateway is the right direction. Quality gate passes. However, two issues need attention:

Must fix

1. chat.send is fire-and-forget but task is marked complete — In task-dispatch.ts, the chat.send path for session control operations (sessions_spawn, sessions_prune, gateway_restart) returns immediately. The calling code then marks the task as done based on the placeholder response text, not the actual operation result. The task should stay in_progress until the operation completes, or use a synchronous RPC method instead.

2. ensureGatewaysTable in POST handler — CREATE TABLE IF NOT EXISTS runs on every health check request. This adds unnecessary SQLite lock contention. Should be in the migration layer.

Note (non-blocking)

3. Timeout units — callOpenClawGateway passes timeout as milliseconds to --timeout. Verify openclaw CLI interprets this as ms (not seconds).

[0xNyk]

Superseded by #407 which was merged. The clawdbot CLI→gateway RPC migration is complete.