Remove contact caching and add contact method standardization to migration template

• Remove contact caching: $contacts() always returns fresh data
• Simplify cache infrastructure: Remove unused contact TTL constants
• Add Phase 2.5 to migration template: Contact Method Standardization
• Update migration pattern: 4-phase → 5-phase Enhanced Migration Pattern
• Eliminate inconsistency: 12 components need $getAllContacts() → $contacts()

Migration Impact:
- Before: 70% non-cached, 30% cached contact fetching (inconsistent)
- After: 100% fresh contact data with unified $contacts() method
- Template enforces: Consistent contact patterns in all future migrations

src/utils/PlatformServiceMixin.ts

@@ -91,9 +91,6 @@ const componentCaches = new WeakMap<
  * Cache configuration constants
  */
 const CACHE_DEFAULTS = {
-  settings: 30000, // 30 seconds TTL for settings
-  contacts: 60000, // 60 seconds TTL for contacts
-  accounts: 30000, // 30 seconds TTL for accounts
   default: 15000, // 15 seconds default TTL
 } as const;
 
@@ -555,25 +552,14 @@ export const PlatformServiceMixin = {
     // =================================================
 
     /**
-     * Load all contacts with caching - $contacts()
-     * Contacts are cached for 60 seconds for performance
+     * Load all contacts (always fresh) - $contacts()
+     * Always fetches fresh data from database for consistency
      * @returns Promise<Contact[]> Array of contact objects
      */
     async $contacts(): Promise<Contact[]> {
-      const cacheKey = "contacts_all";
-      const cached = this._getCached<Contact[]>(cacheKey);
-      if (cached) {
-        return cached;
-      }
-
-      const contacts = await this.$query(
+      return (await this.$query(
         "SELECT * FROM contacts ORDER BY name",
-      );
-      return this._setCached(
-        cacheKey,
-        contacts as Contact[],
-        CACHE_DEFAULTS.contacts,
-      );
+      )) as Contact[];
     },
 
     /**
@@ -767,11 +753,10 @@ export const PlatformServiceMixin = {
     },
 
     /**
-     * Manually refresh contacts cache - $refreshContacts()
-     * Forces reload of contacts from database
+     * Get fresh contacts from database - $refreshContacts()
+     * Always returns fresh data (no caching)
      */
     async $refreshContacts(): Promise<Contact[]> {
-      this._invalidateCache("contacts_all");
       return await this.$contacts();
     },
 
@@ -845,8 +830,6 @@ export const PlatformServiceMixin = {
             safeContact.profileImageUrl,
           ],
         );
-        // Invalidate contacts cache
-        this._invalidateCache("contacts_all");
         return true;
       } catch (error) {
         logger.error("[PlatformServiceMixin] Error inserting contact:", error);
@@ -884,8 +867,6 @@ export const PlatformServiceMixin = {
           params,
         );
 
-        // Invalidate contacts cache
-        this._invalidateCache("contacts_all");
         return true;
       } catch (error) {
         logger.error("[PlatformServiceMixin] Error updating contact:", error);
@@ -946,8 +927,6 @@ export const PlatformServiceMixin = {
     async $deleteContact(did: string): Promise<boolean> {
       try {
         await this.$dbExec("DELETE FROM contacts WHERE did = ?", [did]);
-        // Invalidate contacts cache
-        this._invalidateCache("contacts_all");
         return true;
       } catch (error) {
         logger.error("[PlatformServiceMixin] Error deleting contact:", error);