refactor(services): inline ProfileService logic into AccountViewView

Removes over-engineered ProfileService and ServiceInitializationManager
classes that were only used in one place. Inlines all profile logic
directly into AccountViewView.vue to reduce complexity and improve
maintainability.

- Deletes ProfileService.ts (325 lines)
- Deletes ServiceInitializationManager.ts (207 lines)
- Inlines ProfileData interface and methods into AccountViewView
- Maintains all existing functionality while reducing code footprint

perf(logging): convert excessive info logs to debug level

Reduces console noise by converting high-frequency, low-value logging
from info to debug level across navigation, API calls, and component
lifecycle operations. Improves performance and reduces log verbosity
for normal application flow.

- Router navigation guards: info → debug
- Plan loading operations: info → debug
- User registration checks: info → debug
- Image server rate limits: info → debug
- Component lifecycle events: info → debug
- Settings loading operations: info → debug

Maintains warn/error levels for actual issues while reducing noise
from expected application behavior.

src/views/IdentitySwitcherView.vue

@@ -229,7 +229,7 @@ export default class IdentitySwitcherView extends Vue {
     if (did) {
       try {
         const newSettings = await this.$accountSettings(did);
-        logger.info(
+        logger.debug(
           "[IdentitySwitcher Settings Trace] ✅ New account settings loaded",
           {
             did,
@@ -252,7 +252,7 @@ export default class IdentitySwitcherView extends Vue {
       }
     }
 
-    logger.info(
+    logger.debug(
       "[IdentitySwitcher Settings Trace] 🔄 Navigating to home to trigger watcher",
       {
         newDid: did,