refactor: comentarii strict functionale, fara referinte PRD/stories

Curatare globala a comentariilor si docstring-urilor (app, tools, teste,
scripturi): eliminate referintele la PRD-uri, US-xxx, task-uri istorice si
review-uri; pastrata doar informatia functionala, formulata scurt. Regula
adaugata in CLAUDE.md (sectiunea Stil). Fara modificari de cod sau comportament.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_web_session.py

@@ -1,4 +1,4 @@
-"""Teste US-002 (PRD 3.3): SessionMiddleware + helper-e sesiune in app/web/session.py."""
+"""Teste pentru SessionMiddleware + helper-e sesiune in app/web/session.py."""
 
 from __future__ import annotations
 
@@ -111,10 +111,8 @@ def test_sesiune_seteaza_si_citeste_cont(client_auth):
 def test_logout_curata_sesiunea(client_auth):
     """clear_session sterge account_id si user_id din sesiune."""
     client_auth.get("/set-session?account_id=3&user_id=4")
-    # Verifica ca sesiunea e setata
     data_before = client_auth.get("/get-session").json()
     assert data_before["account_id"] == 3
-    # Logout
     client_auth.get("/logout")
     data_after = client_auth.get("/get-session").json()
     assert data_after["account_id"] is None
@@ -129,12 +127,10 @@ def test_dev_bypass_cont_1(client_dev, monkeypatch):
 
 
 def test_set_session_curata_sesiunea_anterioara(client_auth):
-    """set_session face clear() inainte de a seta (C3 anti-fixare sesiune)."""
-    # Seteaza sesiune initiala cu cont 10
+    """set_session face clear() inainte de a seta (anti-fixare sesiune)."""
     client_auth.get("/set-session?account_id=10&user_id=10")
     data_initial = client_auth.get("/get-session").json()
     assert data_initial["account_id"] == 10
-    # Re-login cu cont nou 20 — sesiunea veche trebuie stearsa inainte
     client_auth.get("/set-session?account_id=20&user_id=20")
     data_nou = client_auth.get("/get-session").json()
     assert data_nou["account_id"] == 20