Dark mode improvements and FarmaClic rebranding

- Dark mode: gray background instead of pure black
- Dark mode: improved notification card visibility (SavedNotifications)
- Dark mode: improved alerts view badge contrast (AlertsView)
- Dark mode: custom pharmacy-themed background image
- Rebranding: replace all logos with FarmaClic branding
- Update PWA icons, favicon, apple-touch-icon, and mobile app icons

apps/frontend/src/index.css

@@ -103,14 +103,14 @@
   --on-tertiary: #3b2a5a;
   --tertiary-container: #524070;
   --on-tertiary-container: #efe7ff;
-  --surface: #111417;
+  --surface: #1e2024;
   --on-surface: #e1e3e4;
   --on-surface-variant: #c0c9bb;
-  --surface-container-lowest: #0c0e10;
-  --surface-container-low: #191c1d;
-  --surface-container: #1e2122;
-  --surface-container-high: #282b2c;
-  --surface-container-highest: #333637;
+  --surface-container-lowest: #171a1d;
+  --surface-container-low: #252830;
+  --surface-container: #2c3038;
+  --surface-container-high: #383c44;
+  --surface-container-highest: #444850;
   --error: #ffb4ab;
   --on-error: #690005;
   --error-container: #93000a;
@@ -122,8 +122,8 @@
   --inverse-on-surface: #2e3132;
   --inverse-primary: #2e7d32;
   --surface-tint: #8ed4a0;
-  --surface-dim: #111417;
-  --surface-bright: #373a3b;
+  --surface-dim: #1e2024;
+  --surface-bright: #4a4e56;
   --surface-variant: #41493e;
   --primary-fixed: #acf4a4;
   --primary-fixed-dim: #91d78a;
@@ -155,10 +155,10 @@
   --fab-shadow: rgba(91, 139, 213, 0.35);
   --warning: #f59e0b;
   --warning-container: rgba(245, 158, 11, 0.15);
-  --suggestion-1: #1e2122;
-  --suggestion-2: #1a2332;
-  --suggestion-3: #1a2a3a;
-  --suggestion-4: #1a3040;
+  --suggestion-1: #2c3038;
+  --suggestion-2: #252d40;
+  --suggestion-3: #25334a;
+  --suggestion-4: #253a55;
   --suggestion-border-1: #333637;
   --suggestion-border-2: #2a4080;
   --suggestion-border-3: #2a4a8a;
@@ -221,11 +221,12 @@ body::after {
 }
 
 [data-theme="dark"] body::before {
-  opacity: 0.15;
+  background-image: url('./assets/bg_dark.png');
+  opacity: 0.55;
 }
 
 [data-theme="dark"] body::after {
-  background-color: rgba(0, 0, 0, 0.55);
+  background-color: rgba(0, 0, 0, 0.25);
 }
 
 #root {