Use content refresh for known targeted files

Route explicit targeted refreshes for known existing files through the content-refresh path that keeps macOS daemon state stable, while preserving structural rebuilds for new, deleted, or unknown paths.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: amichne

backend-standalone/src/main/kotlin/io/github/amichne/kast/standalone/StandaloneAnalysisBackend.kt

@@ -554,7 +554,7 @@ internal class StandaloneAnalysisBackend internal constructor(
             if (query.filePaths.isEmpty()) {
                 session.refreshWorkspace(invalidateCaches = true)
             } else {
-                session.refreshFiles(query.filePaths.toSet())
+                session.refreshTargetedPaths(query.filePaths.toSet())
             }
         }
     }

backend-standalone/src/main/kotlin/io/github/amichne/kast/standalone/StandaloneAnalysisSession.kt

@@ -285,6 +285,14 @@ internal class StandaloneAnalysisSession(
         return buildRefreshResult(normalizedPaths, fullRefresh = false)
     }
 
+    fun refreshTargetedPaths(paths: Set<String>): RefreshResult {
+        val normalizedPaths = normalizeTrackedKotlinPaths(paths)
+        if (normalizedPaths.all(::isKnownRegularKotlinFile)) {
+            return refreshFileContents(paths)
+        }
+        return refreshFiles(paths)
+    }
+
     private data class CachedKtFileEntries(
         val ktFile: KtFile?,
         val targetedKtFile: KtFile?,
@@ -340,6 +348,16 @@ internal class StandaloneAnalysisSession(
         return virtualFile
     }
 
+    private fun isKnownRegularKotlinFile(normalizedPath: NormalizedPath): Boolean {
+        if (!Files.isRegularFile(normalizedPath.toJavaPath())) {
+            return false
+        }
+        if (ktFilesByPath.containsKey(normalizedPath) || targetedKtFilesByPath.containsKey(normalizedPath)) {
+            return true
+        }
+        return sourceIdentifierIndex.get()?.knownPaths()?.contains(normalizedPath.value) == true
+    }
+
     /**
      * Rebuilds the K2 analysis session without a full workspace refresh.
      *