Add debug mode feature flag with environment variable parsing, UI badge indicator, secret redaction utility, and enhanced terminal session management with status checks and session limit error handling

app/core/config.py

@@ -7,10 +7,29 @@ Toutes les variables d'environnement et paramètres sont centralisés ici.
 import os
 from pathlib import Path
 from typing import Optional
+ 
 from pydantic import Field
+from pydantic import field_validator
 from pydantic_settings import BaseSettings
 
 
+def parse_env_bool(value: object, default: bool = False) -> bool:
+    if value is None:
+        return default
+    if isinstance(value, bool):
+        return value
+    if isinstance(value, (int, float)):
+        return bool(value)
+    if isinstance(value, str):
+        normalized = value.strip().lower()
+        if normalized in {"1", "true", "yes"}:
+            return True
+        if normalized in {"0", "false", "no"}:
+            return False
+        return default
+    return default
+
+
 class Settings(BaseSettings):
     """Configuration de l'application Homelab Automation."""
 
@@ -113,6 +132,14 @@ class Settings(BaseSettings):
     )
     log_level: str = "info"
 
+    # === Feature Flags ===
+    debug_mode: bool = Field(default=False, validation_alias="DEBUG_MODE")
+
+    @field_validator("debug_mode", mode="before")
+    @classmethod
+    def _validate_debug_mode(cls, v: object) -> bool:
+        return parse_env_bool(v, default=False)
+
     class Config:
         env_file = ".env"
         env_file_encoding = "utf-8"
@@ -121,3 +148,4 @@ class Settings(BaseSettings):
 
 # Instance singleton de la configuration
 settings = Settings()
+DEBUG_MODE_ENABLED: bool = settings.debug_mode

app/core/dependencies.py

@@ -130,6 +130,15 @@ async def get_current_user(
     return user
 
 
+async def require_debug_mode() -> bool:
+    if not settings.debug_mode:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Debug mode disabled",
+        )
+    return True
+
+
 # === Dépendance: Vérification rôle admin ===
 
 async def require_admin(