chore: minor cleanups from audit round 3

- Drop two unused strings (git_repo_no_issues, git_repo_no_patches);
  the default FeedEmpty composable already provides a generic "Feed
  is empty" + refresh button which is sufficient.
- Import MaterialSymbol in GitRepositoryOverview so the LinkLine
  parameter type isn't a fully-qualified name, per CLAUDE.md style.
- Switch two vertical Spacer(Modifier.size(N.dp)) to
  Modifier.height(N.dp) — functionally identical but conveys intent.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/gitRepo/GitRepositoryOverview.kt

@@ -28,6 +28,7 @@ import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.rememberScrollState
@@ -45,6 +46,7 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.icons.symbols.Icon
+import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbol
 import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.ui.components.ClickableUrl
@@ -156,7 +158,7 @@ private fun TitleHeader(event: GitRepositoryEvent) {
                 overflow = TextOverflow.Ellipsis,
             )
             if (event.isPersonalFork()) {
-                Spacer(Modifier.size(4.dp))
+                Spacer(Modifier.height(4.dp))
                 TopicChip(stringRes(id = R.string.git_repo_personal_fork))
             }
         }
@@ -182,14 +184,14 @@ private fun SectionCard(
             color = MaterialTheme.colorScheme.grayText,
             fontWeight = FontWeight.SemiBold,
         )
-        Spacer(Modifier.size(8.dp))
+        Spacer(Modifier.height(8.dp))
         content()
     }
 }
 
 @Composable
 private fun LinkLine(
-    symbol: com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbol,
+    symbol: MaterialSymbol,
     url: String,
 ) {
     Row(

amethyst/src/main/res/values/strings.xml

@@ -2079,8 +2079,6 @@
     <string name="git_repo_section_maintainers">Maintainers</string>
     <string name="git_repo_section_topics">Topics</string>
     <string name="git_repo_personal_fork">Personal fork</string>
-    <string name="git_repo_no_issues">No issues for this repository yet.</string>
-    <string name="git_repo_no_patches">No patches or pull requests yet.</string>
     <string name="nsite_title">Static Website: %1$s</string>
     <string name="nsite_root_site">Root Site</string>
     <string name="nsite_source">Source:</string>