fix: remove hardcoded ~/.hermes paths from optional skills

Fix memento_cards.py and telephony.py to use HERMES_HOME env var
with Path.home() fallback instead of hardcoded "~/.hermes".

Leaves migration script as-is (intentionally references old paths).

Closes #479

hermes_constants.py

@@ -14,7 +14,7 @@ def get_hermes_home() -> Path:
     Reads HERMES_HOME env var, falls back to ~/.hermes.
     This is the single source of truth — all other copies should import this.
     """
-    return Path(os.getenv("HERMES_HOME", str(Path.home() / ".hermes"))).expanduser()
+    return Path(os.getenv("HERMES_HOME", Path.home() / ".hermes"))
 
 
 def get_optional_skills_dir(default: Path | None = None) -> Path:

optional-skills/productivity/memento-flashcards/scripts/memento_cards.py

@@ -15,7 +15,7 @@ import uuid
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 
-_HERMES_HOME = Path(os.environ.get("HERMES_HOME", Path.home() / ".hermes"))
+_HERMES_HOME = Path(os.environ.get("HERMES_HOME", str(Path.home() / ".hermes")))
 DATA_DIR = _HERMES_HOME / "skills" / "productivity" / "memento-flashcards" / "data"
 CARDS_FILE = DATA_DIR / "cards.json"
 

optional-skills/productivity/telephony/scripts/telephony.py

@@ -69,7 +69,7 @@ class OwnedTwilioNumber:
 
 
 def _hermes_home() -> Path:
-    return Path(os.environ.get("HERMES_HOME", "~/.hermes")).expanduser()
+    return Path(os.environ.get("HERMES_HOME", str(Path.home() / ".hermes")))
 
 
 def _env_path() -> Path: