mios consolidation: remove 3 orphan services + final qwen3:1.7b ref + OWUI dropdown branding

Three pieces of post-consolidation cleanup, all driven by operator
chats 2026-05-17:

  1. Orphan services: mios-agent-nudger, mios-cron-director,
     mios-log-watcher. Their functionality was folded into
     mios-daemon (refusal_loop, cron_loop, classify_loop)
     earlier in the session but the unit files + helper scripts
     stayed on disk. Removed both from /usr/lib/systemd/system/
     and /usr/libexec/mios/. mios-daemon is now the SINGLE
     micro-LLM service.

  2. firstboot delegation.model: last remaining qwen3:1.7b ref
     at line 786 (had a trailing comment that survived the bulk
     sed). Replaced with qwen3.5:4b. Repo + live both clean.

  3. OWUI model dropdown: had THREE rows showing "MiOS-Agent"
     (manual MiOS-Agent + manual mios-agent + auto-generated
     mios_agent.mios-agent from the pipe). Deleted the two
     manual rows; OWUI now auto-generates a single entry from
     the pipe (function.name = "MiOS-Agent", pipe.name = ""
     so the dropdown reads exactly "MiOS-Agent" -- no
     "MiOS-AgentMiOS-Agent" doubling).

mios-micro-llm and mios-agent-session kept: micro-llm is a CLI
client helper (not a service) for ad-hoc shims; agent-session is
the per-sandbox orchestrator (btrfs snapshots + systemd template),
not LLM-shaped.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 2 people

usr/libexec/mios/mios-hermes-firstboot

@@ -783,7 +783,7 @@ browser:
 delegation:
   provider: custom:local-ollama
   base_url: http://localhost:11434/v1
-  model: qwen3:1.7b                 # small, fast, tool-capable -- runs on CPU alongside GPU main
+  model: qwen3.5:4b                  # CPU-friendly, 262K context (above 64K floor), tool-capable -- runs on CPU alongside GPU main
   max_concurrent_children: 6        # 16 cores -> ~2.5 cores per child even at full fan-out
   max_spawn_depth: 2                # allow one level of sub-delegation (children can spawn grandchildren)
   child_timeout_seconds: 600