feat: split portfolio and opportunity decision models

CLAUDE.md

@@ -20,8 +20,10 @@ CoinHunter V2 is a Binance-first crypto trading CLI with a flat, direct architec
 - **`src/coinhunter/services/`** — Contains all domain logic:
   - `account_service.py` — balances, positions, overview
   - `market_service.py` — tickers, klines, scan universe, symbol normalization
+  - `signal_service.py` — shared market signal scoring used by scan and portfolio analysis
+  - `portfolio_service.py` — held-position review and add/hold/trim/exit recommendations
   - `trade_service.py` — spot and USDT-M futures order execution
-  - `opportunity_service.py` — portfolio recommendations and market scanning
+  - `opportunity_service.py` — market scanning and entry/watch/skip recommendations
 - **`src/coinhunter/binance/`** — Thin wrappers around official Binance connectors:
   - `spot_client.py` wraps `binance.spot.Spot`
   - `um_futures_client.py` wraps `binance.um_futures.UMFutures`
@@ -34,7 +36,7 @@ CoinHunter V2 is a Binance-first crypto trading CLI with a flat, direct architec
 
 User data lives in `~/.coinhunter/` by default (override with `COINHUNTER_HOME`):
 
-- `config.toml` — runtime, binance, trading, and opportunity settings
+- `config.toml` — runtime, binance, trading, signal, opportunity, and portfolio settings
 - `.env` — `BINANCE_API_KEY` and `BINANCE_API_SECRET`
 - `logs/audit_YYYYMMDD.jsonl` — structured audit log