fix: adapt the bridge to omp 18.4.8 host differences

- resolve the agent dir through the host getAgentDir() (registered by the composition root) instead of sniffing execPath/argv
- synthesize agent_settled from the first terminal agent_end on omp
- read the live model through ctx.models.current() and prefer it over the stored model on omp
- adapt omp Settings (reloadFromDisk, global enabledModels) at the SDK boundary and drop scoped-model persistence on omp

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+- `omp Agent Directory`: Resolve the agent directory from the host's own `getAgentDir()` (registered by the composition root via `setHostAgentDirResolver`) instead of sniffing `execPath`/`argv[1]` for an `omp` prefix. omp installed through Bun runs as `bun …/@oh-my-pi/pi-coding-agent/dist/cli.js`, which matched neither, so with `telegram.json` in `~/.omp/agent` the bridge never connected and wrote its log and bus socket under `~/.pi/agent`. `PI_CODING_AGENT_DIR` still wins; with no host registered the fallback stays `~/.pi/agent`. Impact: a bot token saved by `/telegram-setup` lives in omp's own agent directory and is found again. `lib/paths.ts` stays free of Pi SDK imports, which cost about a second of startup per importing process.
+- `omp Settled Boundary`: omp never emits `agent_settled`, the only place the activity runtime finalized a turn. On omp the first terminal `agent_end` (no `willContinue: true`, which omp sets for retries, compaction continuations, todo/plan reminders and async wakes) now drives `onAgentSettled`; hosts that emit `agent_settled` natively are unchanged. Impact: Activity API consumers receive `agent-settled` and the activity id no longer leaks across turns.
+- `omp Current Model`: omp never emits `model_select`, so the stored current model went stale after a local `/model` switch, and omp builds command contexts by spreading a base context, which freezes `ctx.model` at the moment of `/telegram-connect`. On omp the live `ctx.models.current()` now wins over both, and the stored value no longer overrides it. Impact: the Telegram model menu marks the model omp is actually using.
+- `omp Settings Manager`: omp's `SettingsManager.create()` returns its own `Settings`, which has no `reload()` or `getEnabledModels()`; rendering the model menu and `/status` failed with `settingsManager.reload is not a function`, so no menu reached Telegram. The SDK boundary now adapts it (`reloadFromDisk()`, global `enabledModels` read) and scoped-model persistence is not offered on omp. Impact: the operator menus render on omp.
 - `Time Injection`: Reject non-finite configured intervals and resume time annotations after the wall clock moves backwards.
 - `Paths`: Resolve diagnostic paths from the current agent directory and profile instead of reporting hard-coded `~/.pi` locations.
 - `Security`: Apply the `brace-expansion` `5.0.12` override at both root and coding-agent scopes to address the latest recursion and expansion denial-of-service advisories.