feat: Enhance search functionality and user experience

- Added local account metadata handling in SearchScreen for improved "Saved Messages" search fallback.
- Updated search logic to include username and account name checks when searching for the user.
- Introduced search logging in SearchUsersViewModel for better debugging and tracking of search queries.
- Refactored image download process in AttachmentComponents to include detailed logging for debugging.
- Created AttachmentDownloadDebugLogger to manage and display download logs.
- Improved DeviceVerificationBanner UI for better user engagement during device verification.
- Adjusted OtherProfileScreen layout to enhance information visibility and user interaction.
- Updated network security configuration to include new Let's Encrypt certificate for CDN.

app/src/main/res/raw/letsencrypt_r12.pem

@@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----
+MIIFBjCCAu6gAwIBAgIRAMISMktwqbSRcdxA9+KFJjwwDQYJKoZIhvcNAQELBQAw
+TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
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+-----END CERTIFICATE-----

app/src/main/res/xml/network_security_config.xml

@@ -1,17 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
 <network-security-config>
+    <!-- Базовые trust anchors для всех HTTPS доменов (включая новый CDN) -->
+    <base-config cleartextTrafficPermitted="false">
+        <trust-anchors>
+            <!-- GlobalSign GCC R6 AlphaSSL CA 2025 (цепочка *.rosetta.im) -->
+            <certificates src="@raw/globalsign_ca"/>
+            <!-- Let's Encrypt R12 (цепочка rosetta-im.com/defaultcontent) -->
+            <certificates src="@raw/letsencrypt_r12"/>
+            <certificates src="system"/>
+        </trust-anchors>
+    </base-config>
+
     <!-- HTTP для локального сервера -->
     <domain-config cleartextTrafficPermitted="true">
         <domain includeSubdomains="true">46.28.71.12</domain>
     </domain-config>
-    
-    <!-- HTTPS с кастомным CA для CDN -->
-    <domain-config>
-        <domain includeSubdomains="true">cdn.rosetta-im.com</domain>
-        <domain includeSubdomains="true">rosetta-im.com</domain>
-        <trust-anchors>
-            <certificates src="@raw/globalsign_ca"/>
-            <certificates src="system"/>
-        </trust-anchors>
-    </domain-config>
 </network-security-config>