android, desktop: sharing channel links (#6828)

* android, desktop: sharing channel links - types, api, strings

* implementation

* fix build

* improve layout

* improve card layouts

* better divider

* preview image

* icon, preview

* better icons

* bigger icon

* darker icons

* better icon colors

* better layouts

* compose preview for chat links

* sizes

* fix editing

---------

Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>

apps/multiplatform/common/src/commonMain/resources/MR/base/strings.xml

@@ -533,8 +533,21 @@
   <string name="share_file">Share file…</string>
   <string name="forward_message">Forward message…</string>
   <string name="forward_multiple">Forward messages…</string>
+  <string name="share_channel">Share channel…</string>
   <string name="cannot_share_message_alert_title">Cannot send message</string>
   <string name="cannot_share_message_alert_text">Selected chat preferences prohibit this message.</string>
+  <string name="share_via_chat">Share via chat</string>
+  <string name="tap_to_open">Tap to open</string>
+  <string name="chat_link_channel">Channel link</string>
+  <string name="chat_link_group">Group link</string>
+  <string name="chat_link_business_address">Business address</string>
+  <string name="chat_link_contact_address">Contact address</string>
+  <string name="chat_link_one_time">One-time link</string>
+  <string name="chat_link_from_owner">(from owner)</string>
+  <string name="chat_link_signed">(signed)</string>
+  <string name="error_sharing_channel">Error sharing channel</string>
+  <string name="owner_verification_passed">Link signature verified.</string>
+  <string name="owner_verification_failed">⚠️ Signature verification failed: %s.</string>
 
   <!-- ComposeView.kt, helpers -->
   <string name="attach">Attach</string>

apps/multiplatform/common/src/commonMain/resources/MR/images/ic_bigtop_updates_circle_filled.svg

@@ -0,0 +1 @@
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apps/multiplatform/common/src/commonMain/resources/MR/images/ic_bigtop_updates_padded.svg

@@ -1,8 +0,0 @@
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