chore(branding): rebrand FixMate to CityPulse across codebase

- Update product name in README, backend docs, and design tokens
- Rename Flutter root widget to CityPulseApp and update tests
- Update dashboard brand strings and HTML title
- Refresh i18n strings (en/ms) and welcome taglines
- Adjust backend API title/description and root message
- Minor formatting in ApiService comments; no logic changes
- Update Android/iOS manifest comments and pubspec description

No API endpoints or response schema changes.

assets/lang/en.json

@@ -1,5 +1,5 @@
 {
-  "app.name": "FixMate",
+  "app.name": "CityPulse",
   "nav.report": "Report",
   "nav.map": "Map",
   "nav.myReports": "My Reports",
@@ -81,14 +81,14 @@
   "settings.theme.dark": "Dark",
   "lang.en": "English",
   "lang.ms": "Bahasa Malaysia",
-  "welcome.title": "Spot it. Snap it. Fix it.",
+  "welcome.title": "Snap. Detect. Fix.",
   "welcome.subtitle": "Report city issues in seconds with AI-powered detection. Help create safer, better communities together.",
   "cta.continueGuest": "Continue as guest",
   "cta.signIn": "Sign in",
   "cta.skip": "Skip",
   "cta.next": "Next",
   "cta.getStarted": "Get started",
-  "onboarding.header": "Welcome to FixMate",
+  "onboarding.header": "Welcome to CityPulse",
   "onboarding.title1": "Fast Issue Reporting",
   "onboarding.body1": "Simply take a photo of any urban issue - our AI automatically identifies and categorizes the problem in seconds.",
   "onboarding.title2": "Smart City Mapping",
@@ -99,12 +99,12 @@
   "auth.signInWithApple": "Sign in with Apple",
   "auth.signInWithGoogle": "Sign in with Google",
   "auth.comingSoon": "Coming soon",
-  "welcome.title": "Spot it. Snap it. Fix it.",
+  "welcome.title": "Snap. Detect. Fix.",
   "welcome.subtitle": "Report city issues in seconds with AI-powered detection. Help create safer, better communities together.",
   "cta.continueGuest": "Continue as Guest",
   "cta.signIn": "Sign In",
   "cta.skip": "Skip for now",
-  "onboarding.header": "Welcome to FixMate",
+  "onboarding.header": "Welcome to CityPulse",
   "onboarding.title1": "Fast Issue Reporting",
   "onboarding.subtitle1": "AI-Powered Detection",
   "onboarding.body1": "Simply take a photo of any urban issue - our AI automatically identifies and categorizes the problem in seconds.",

assets/lang/ms.json

@@ -1,5 +1,5 @@
 {
-  "app.name": "FixMate",
+  "app.name": "CityPulse",
   "nav.report": "Lapor",
   "nav.map": "Peta",
   "nav.myReports": "Laporan Saya",
@@ -88,7 +88,7 @@
   "cta.skip": "Langkau",
   "cta.next": "Seterusnya",
   "cta.getStarted": "Mula",
-  "onboarding.header": "Selamat datang ke FixMate",
+  "onboarding.header": "Selamat datang ke CityPulse",
   "onboarding.title1": "Tangkap pantas",
   "onboarding.body1": "Ambil gambar dan hantar dalam kurang satu minit.",
   "onboarding.title2": "Peta yang jelas",
@@ -104,7 +104,7 @@
   "cta.continueGuest": "Teruskan sebagai Tetamu",
   "cta.signIn": "Log Masuk",
   "cta.skip": "Langkau buat masa ini",
-  "onboarding.header": "Selamat Datang ke FixMate",
+  "onboarding.header": "Selamat Datang ke CityPulse",
   "onboarding.title1": "Laporan Isu Pantas",
   "onboarding.subtitle1": "Pengesanan Berkuasa AI",
   "onboarding.body1": "Hanya ambil gambar mana-mana isu bandar - AI kami secara automatik mengenal pasti dan mengkategorikan masalah dalam beberapa saat.",

assets/tokens/design-tokens.json

@@ -1,6 +1,6 @@
 {
   "meta": {
-    "name": "FixMate Design Tokens",
+    "name": "CityPulse Design Tokens",
     "version": "1.0.0",
     "brand": "Civic Premium – Citizen First"
   },