refactor: remove Responses API, consolidate to Chat Completions (#272)

* fix: strip reasoning from LLM responses and persist assistant messages reliably

- Filter out `type: "reasoning"` output items from NEAR AI Responses API
  parsing so chain-of-thought never reaches the UI (nearai.rs)
- Rewrite clean_response with regex-based tag stripping that is
  code-aware (preserves tags inside fenced blocks and inline backticks),
  supports 9+ tag names (think, thought, reasoning, reflection, etc.),
  handles <final> extraction, pipe-delimited tags, and case/whitespace
  tolerance (reasoning.rs)
- Add Reasoning::complete() helper so all non-agentic LLM call sites
  (summarize, suggest, heartbeat, compaction) get automatic response
  cleaning; thread SafetyLayer through to those callers
- Change persist_turn from fire-and-forget tokio::spawn to awaited async
  so both user and assistant messages are written before returning,
  preventing data loss on shutdown/restart
- Pass input_count through seed_response_chain so response chaining
  delta calculation is accurate after thread hydration on restart
- Make NearAiResponse.usage optional and preserve response_id in alt
  response path for chaining continuity
- Persist session token to DB during onboarding wizard so runtime
  loads it without legacy-key fallback; suppress spurious warning on
  fresh installs
- Fix dev tool double-registration when builder already registers them
- Load dotenv/ironclaw env for doctor and status subcommands
- Reduce startup log noise (demote info→debug for skills, remove
  redundant info lines)

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* Nudge to not loop over tools continuesly

* refactor: remove Responses API, consolidate NEAR AI to Chat Completions only

The Responses API provider (nearai.rs, 1278 lines) added significant complexity
(response chaining state machine, delta message calculation, previous_response_id
persistence) for marginal benefit. This consolidates to the Chat Completions API
only, upgrading NearAiChatProvider with dual auth (session token + API key) and
401 retry for session token renewal.

- Delete src/llm/nearai.rs (Responses API provider)
- Upgrade nearai_chat.rs with SessionManager, dual auth, flexible list_models
- Remove response_id from CompletionResponse and ToolCompletionResponse
- Remove seed_response_chain/get_response_chain_id from LlmProvider trait
- Remove response chain persistence from agent (thread_ops, session)
- Remove NearAiApiMode enum and NEARAI_API_MODE config
- Clean up all wrapper providers (retry, circuit_breaker, failover, cache)
- Update documentation (CLAUDE.md, .env.example)

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* feat: runtime log level control via gateway UI and URL parameter

Add server-side log level switching using tracing_subscriber::reload::Layer
so the EnvFilter can be swapped at runtime without restarting. Expose via
GET/PUT /api/logs/level endpoints, a "Server: LEVEL" dropdown in the logs
toolbar, and a ?log_level=debug URL parameter for one-click activation.

Also applies cargo fmt to pre-existing files (llm/, tests/).

Co-Authored-By: Claude Opus 4.6 <[email protected]>

---------

Co-authored-by: Claude Opus 4.6 <[email protected]>

.env.example

@@ -6,21 +6,19 @@ DATABASE_POOL_SIZE=10
 # LLM_BACKEND=nearai           # default
 # Possible values: nearai, ollama, openai_compatible, openai, anthropic, tinfoil
 
-# === NEAR AI Chat (Responses API, session token auth) ===
-# Default mode. Uses browser OAuth (GitHub/Google) on first run.
-# Session token stored in ~/.ironclaw/session.json automatically.
-# For hosting providers: set NEARAI_SESSION_TOKEN env var directly.
+# === NEAR AI (Chat Completions API) ===
+# Two auth modes:
+#   1. Session token (default): Uses browser OAuth (GitHub/Google) on first run.
+#      Session token stored in ~/.ironclaw/session.json automatically.
+#      Base URL defaults to https://private.near.ai
+#   2. API key: Set NEARAI_API_KEY to use API key auth from cloud.near.ai.
+#      Base URL defaults to https://cloud-api.near.ai
 NEARAI_MODEL=zai-org/GLM-5-FP8
 NEARAI_BASE_URL=https://private.near.ai
 NEARAI_AUTH_URL=https://private.near.ai
 # NEARAI_SESSION_TOKEN=sess_...                  # hosting providers: set this
 # NEARAI_SESSION_PATH=~/.ironclaw/session.json   # optional, default shown
-
-# === NEAR AI Cloud (Chat Completions API, API key auth) ===
-# Auto-selected when NEARAI_API_KEY is set. Get a key from cloud.near.ai.
-# NEARAI_API_KEY=...
-# NEARAI_BASE_URL=https://cloud-api.near.ai      # default for cloud mode
-# NEARAI_API_MODE=chat_completions               # auto-detected from API key
+# NEARAI_API_KEY=...                             # API key from cloud.near.ai
 
 # Local LLM Providers (Ollama, LM Studio, vLLM, LiteLLM)