niri: drop untracked noctalia.kdl include; sync memory skills

- remove 'include noctalia.kdl' from shared config.kdl: the file is a
  per-host noctalia template render (colors from local palette), was
  never committed, and made every config load fail hard on hosts where
  it was absent — niri 26.04 falls back to DEFAULT config on parse
  error, silently killing keybinds/rules/layout/autostart
- theme integration now only via keybinds (noctalia msg verbs) + the
  host-local rendered files (see managed skill noctalia-template-offline-render)
- sync agent memories: delete retired memory-store skills, add new ones

agent/memories/--home-dank-.omp--/skills/model_config_sync/SKILL.md

@@ -0,0 +1 @@
+Manages dual AI model configs (`~/.pi/agent/models.json` as source, `~/.omp/agent/models.yml` as import/generated). Always edit both in lock-step. Context sizes use Ki-style multiples (e.g., 200k = 204800). For `frank-default-small`, update `contextWindow` and `maxTokens` together. Validate with `jq` and `python3 -c "import yaml..."`. Providers: `llamacpp (dankserver)` & `llamacpp (dankclaw)`. NPU `gemma4-it:e4b` uses port 7771.