Fix progress bar to show output filename instead of generic label

Changed progress bar task name from "Processing texts" to the actual
output filename (e.g., "goe.krill.tar", "zge24.krill.tar").

This allows users to identify which conversion is running when multiple
conversions are executed in parallel.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Change-Id: I73dfc0e031575787d8f9108c0abd3e7d2475676d
diff --git a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt
index 4a5923a..c0d0899 100644
--- a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt
+++ b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt
@@ -616,7 +616,7 @@
                 val totalTexts = zipInventory.values.flatten().toSet().size
                 if (totalTexts > 0) {
                     incrementalProgressBar = ProgressBarBuilder()
-                        .setTaskName("Processing texts")
+                        .setTaskName("$baseZipName.krill.tar")
                         .setInitialMax(totalTexts.toLong())
                         .setStyle(ProgressBarStyle.COLORFUL_UNICODE_BAR)
                         .setUpdateIntervalMillis(500)