fix(session): pass REDDIT_SESSION_FILE env to post.py subprocess; fix status check path

refresh_session() was spawning post.py --login without the REDDIT_SESSION_FILE env
var, so Playwright wrote the refreshed session to the legacy session.json default
instead of sessions/alan_reddit.json. The poster then read a stale file and
failed with 'Playwright re-login failed'.

- Add os import; pass env={...os.environ, REDDIT_SESSION_FILE: str(session_file)}
  to subprocess.run so post.py writes to the correct per-account path
- manage.sh status now checks sessions/alan_reddit.json (canonical) not session.json
- Replace session.json with a symlink to sessions/alan_reddit.json for legacy compat

app/services/reddit/session.py

@@ -7,6 +7,7 @@ Session cookies are stored in a JSON file and refreshed automatically when stale
 from __future__ import annotations
 
 import json
+import os
 import subprocess
 import sys
 import time
@@ -33,7 +34,7 @@ def session_is_valid(session_file: Path | None = None) -> bool:
 
 
 def refresh_session(session_file: Path | None = None) -> None:
-    """Re-login via Playwright (xvfb-run) and overwrite session.json."""
+    """Re-login via Playwright (xvfb-run) and overwrite the session file."""
     if session_file is None:
         session_file = Path(get_settings().reddit_session_file)
     session_file.parent.mkdir(parents=True, exist_ok=True)
@@ -41,6 +42,7 @@ def refresh_session(session_file: Path | None = None) -> None:
     result = subprocess.run(
         ["xvfb-run", "--auto-servernum", sys.executable, str(_POST_SCRIPT), "--login"],
         cwd=str(_POST_SCRIPT.parent),
+        env={**os.environ, "REDDIT_SESSION_FILE": str(session_file)},
         timeout=120,
     )
     if result.returncode != 0:

manage.sh

@@ -196,8 +196,8 @@ case "$cmd" in
         info "  Scheduler ${sched} scheduled"
     fi
 
-    # Session age
-    SESSION_FILE="${DATA_DIR}/session.json"
+    # Session age — check the canonical per-account file, not the legacy session.json
+    SESSION_FILE="${DATA_DIR}/sessions/alan_reddit.json"
     if [[ -f "$SESSION_FILE" ]]; then
         age_h=$(python3 -c "import time,os; print(f\"{(time.time()-os.path.getmtime('$SESSION_FILE'))/3600:.1f}h\")" 2>/dev/null || echo "?")
         if python3 -c "import time,os; exit(0 if (time.time()-os.path.getmtime('$SESSION_FILE'))/3600 < 12 else 1)" 2>/dev/null; then
@@ -206,7 +206,7 @@ case "$cmd" in
             warn "  Session   ${age_h} old (stale — run: ./manage.sh login)"
         fi
     else
-        warn "  Session   no session.json — run: ./manage.sh login"
+        warn "  Session   no session file — run: ./manage.sh login"
     fi
 
     echo ""