Fix unused globals and redundant JS conditions (CodeQL)

Remove vestigial _debug_logging_enabled and _debug_logging_enabled_at
globals from support.py (written but never read; DB is queried directly).
Simplify hue classification in PrintersPage.tsx and colors.ts by removing
always-true h < 345 checks and dead 'Unknown' fallbacks. Narrow
getWifiStrength param type to remove always-false null guard.

backend/app/api/routes/support.py

@@ -30,10 +30,6 @@ from backend.app.models.user import User
 router = APIRouter(prefix="/support", tags=["support"])
 logger = logging.getLogger(__name__)
 
-# In-memory state for debug logging (persisted to settings DB)
-_debug_logging_enabled = False
-_debug_logging_enabled_at: datetime | None = None
-
 
 class DebugLoggingState(BaseModel):
     enabled: bool
@@ -114,12 +110,8 @@ async def get_debug_logging_state(
     _: User | None = RequirePermissionIfAuthEnabled(Permission.SETTINGS_READ),
 ):
     """Get current debug logging state."""
-    global _debug_logging_enabled, _debug_logging_enabled_at
-
     async with async_session() as db:
         enabled, enabled_at = await _get_debug_setting(db)
-        _debug_logging_enabled = enabled
-        _debug_logging_enabled_at = enabled_at
 
     duration = None
     if enabled and enabled_at:
@@ -138,12 +130,8 @@ async def toggle_debug_logging(
     _: User | None = RequirePermissionIfAuthEnabled(Permission.SETTINGS_UPDATE),
 ):
     """Enable or disable debug logging."""
-    global _debug_logging_enabled, _debug_logging_enabled_at
-
     async with async_session() as db:
         enabled_at = await _set_debug_setting(db, toggle.enabled)
-        _debug_logging_enabled = toggle.enabled
-        _debug_logging_enabled_at = enabled_at
 
     _apply_log_level(toggle.enabled)
 
@@ -458,13 +446,9 @@ async def generate_support_bundle(
     _: User | None = RequirePermissionIfAuthEnabled(Permission.SETTINGS_READ),
 ):
     """Generate a support bundle ZIP file for issue reporting."""
-    global _debug_logging_enabled, _debug_logging_enabled_at
-
     # Check if debug logging is enabled
     async with async_session() as db:
-        enabled, enabled_at = await _get_debug_setting(db)
-        _debug_logging_enabled = enabled
-        _debug_logging_enabled_at = enabled_at
+        enabled, _enabled_at = await _get_debug_setting(db)
 
     if not enabled:
         raise HTTPException(
@@ -500,13 +484,9 @@ async def generate_support_bundle(
 
 async def init_debug_logging():
     """Initialize debug logging state from database on startup."""
-    global _debug_logging_enabled, _debug_logging_enabled_at
-
     try:
         async with async_session() as db:
-            enabled, enabled_at = await _get_debug_setting(db)
-            _debug_logging_enabled = enabled
-            _debug_logging_enabled_at = enabled_at
+            enabled, _ = await _get_debug_setting(db)
 
             if enabled:
                 _apply_log_level(True)

frontend/src/pages/PrintersPage.tsx

@@ -398,9 +398,7 @@ function hexToBasicColorName(hex: string | null | undefined): string {
   if (h < 200) return 'Cyan';
   if (h < 260) return 'Blue';
   if (h < 290) return 'Purple';
-  if (h < 345) return 'Pink';
-
-  return 'Unknown';
+  return 'Pink';
 }
 
 // Format K value with 3 decimal places, default to 0.020 if null
@@ -707,8 +705,7 @@ function getPrinterImage(model: string | null | undefined): string {
   return '/img/printers/default.png';
 }
 
-function getWifiStrength(rssi: number | null | undefined): { labelKey: string; color: string; bars: number } {
-  if (rssi == null) return { labelKey: '', color: 'text-bambu-gray', bars: 0 };
+function getWifiStrength(rssi: number): { labelKey: string; color: string; bars: number } {
   if (rssi >= -50) return { labelKey: 'printers.wifiSignal.excellent', color: 'text-bambu-green', bars: 4 };
   if (rssi >= -60) return { labelKey: 'printers.wifiSignal.good', color: 'text-bambu-green', bars: 3 };
   if (rssi >= -70) return { labelKey: 'printers.wifiSignal.fair', color: 'text-yellow-400', bars: 2 };

frontend/src/utils/colors.ts

@@ -90,8 +90,7 @@ export function hexToColorName(hex: string | null | undefined): string {
   if (h < 200) return 'Cyan';
   if (h < 260) return 'Blue';
   if (h < 290) return 'Purple';
-  if (h < 345) return 'Pink';
-  return 'Unknown';
+  return 'Pink';
 }
 
 /**