feat: add theme system, branding, and task logging

- Add light/dark/system theme toggle in settings
- Add DearDiary.io branding in navbar
- Add task logging for journal generation with request/response
- Rename project from TotalRecall to DearDiary
- Update Docker configuration

android/app/build.gradle.kts

@@ -4,11 +4,11 @@ plugins {
 }
 
 android {
-    namespace = "com.totalrecall"
+    namespace = "com.deardiary"
     compileSdk = 34
 
     defaultConfig {
-        applicationId = "com.totalrecall"
+        applicationId = "com.deardiary"
         minSdk = 26
         targetSdk = 34
         versionCode = 1