fix(claude-do): merge fix(ui,worker): Diff-Zähler locale-fest machen und toten Par

ClaudeDo-Task: 1085277d-ba7e-4e58-b06d-751e1b99b96f

src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs

@@ -1503,12 +1503,17 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
         catch { /* best-effort */ }
     }
 
+    // Shared by TaskRowViewModel.UpdateFromEntity — this is the one parser for
+    // `git diff --stat`'s summary line ("N insertions(+), M deletions(-)"). Anchored on the
+    // literal "(+)"/"(-)" markers rather than the English words: git for Windows localizes
+    // "insertion"/"deletion" to the OS language (e.g. German "Einfügung(en)"/"Löschung(en)"),
+    // but always keeps the untranslated (+)/(-) suffix, so this reads correctly in any locale.
     internal static (int Additions, int Deletions) ParseDiffStat(string? stat)
     {
         if (string.IsNullOrEmpty(stat)) return (0, 0);
         int add = 0, del = 0;
-        var m1 = System.Text.RegularExpressions.Regex.Match(stat, @"(\d+)\s+insertion");
-        var m2 = System.Text.RegularExpressions.Regex.Match(stat, @"(\d+)\s+deletion");
+        var m1 = System.Text.RegularExpressions.Regex.Match(stat, @"(\d+)[^,\n]*\(\+\)");
+        var m2 = System.Text.RegularExpressions.Regex.Match(stat, @"(\d+)[^,\n]*\(-\)");
         if (m1.Success) int.TryParse(m1.Groups[1].Value, out add);
         if (m2.Success) int.TryParse(m2.Groups[1].Value, out del);
         return (add, del);

src/ClaudeDo.Ui/ViewModels/Islands/TaskRowViewModel.cs

@@ -500,7 +500,7 @@ public sealed partial class TaskRowViewModel : ViewModelBase
         // Any entity-backed refresh reflects a settled state, so the transient creation-phase
         // banner (set from the OperationProgress broadcast) has nothing left to announce.
         CreationPhase     = null;
-        var (add, del) = ParseDiffStat(t.Worktree?.DiffStat);
+        var (add, del) = DetailsIslandViewModel.ParseDiffStat(t.Worktree?.DiffStat);
         Number            = t.Number;
         Title             = t.Title;
         ListName          = t.List?.Name ?? "";
@@ -529,18 +529,4 @@ public sealed partial class TaskRowViewModel : ViewModelBase
         FailureTurnsUsed  = t.FailureTurnsUsed;
         FailureMaxTurns   = t.FailureMaxTurns;
     }
-
-    // Best-effort parse of diff stat strings like "+12 -3" or "12 additions, 3 deletions".
-    private static (int add, int del) ParseDiffStat(string? s)
-    {
-        if (string.IsNullOrWhiteSpace(s)) return (0, 0);
-        int add = 0, del = 0;
-        var parts = s.Split(new[] { ' ', ',', '\t' }, StringSplitOptions.RemoveEmptyEntries);
-        foreach (var p in parts)
-        {
-            if (p.Length > 1 && p[0] == '+' && int.TryParse(p.AsSpan(1), out var a)) add = a;
-            else if (p.Length > 1 && (p[0] == '-' || p[0] == '\u2212') && int.TryParse(p.AsSpan(1), out var d)) del = d;
-        }
-        return (add, del);
-    }
 }

src/ClaudeDo.Worker/CLAUDE.md

@@ -130,7 +130,7 @@ Full flow, invariants, and model/effort/max-turns resolution (including the low-
 - **ClaudeProcess** — spawns `claude -p --output-format stream-json --verbose --permission-mode auto` (or whatever app settings specify). Prompt via stdin, NDJSON from stdout. CancellationToken kills the process tree. Resolves `_cfg.ClaudeBin` via `ExecutableResolver` (`ClaudeDo.Data`, shared with `ClaudeCliPreflight` and the Installer's checks) before spawning — a `.cmd`/`.bat` shim (e.g. an npm-installed `claude`) is launched through `cmd.exe /c` since `UseShellExecute = false` can't exec a shim directly; a resolved `.exe` starts exactly as before. Throws if nothing resolves. *(Not yet on `main` — see `Environment Checks` in `ClaudeDo.Installer/CLAUDE.md`.)*
 - **ClaudeArgsBuilder** — `--model`, `--effort`, `--max-turns`, `--append-system-prompt`, `--agents`, `--json-schema`, `--resume`
 - **StreamAnalyzer** — parses NDJSON; extracts session_id, token counts, turn counts, result text, structured output. Replaced MessageParser.
-- **WorktreeManager** — worktrees on `claudedo/{taskId[:8]}` branches; commits with semantic messages, updates DB with head commit + diff stats
+- **WorktreeManager** — worktrees on `claudedo/{id}` branches (full task GUID, dashes stripped — a prefix isn't enough to rule out collisions); commits with semantic messages, updates DB with head commit + diff stats
 - **CommitMessageBuilder** — `{commitType}(slug): title\n\ndescription\n\nClaudeDo-Task: taskId`; `BuildMerge` is the merge-commit variant (`{commitType}(slug): merge title` + trailer). **Every merge caller passes a blank commit message on purpose** — `TaskMergeService` fills in `BuildMerge` from the task's commit type and its list's name, which is the only place that knows both. Don't reintroduce a caller-side literal.
 - **TaskResetService** — discards a failed task's worktree, resets the row to Idle, preserves run history
 - **AgentFileService** — manages `~/.claudeDo/agents/*.md`; list/refresh via SignalR

tests/ClaudeDo.Worker.Tests/UiVm/ParseDiffStatTests.cs

@@ -1,4 +1,6 @@
+using ClaudeDo.Data.Models;
 using ClaudeDo.Ui.ViewModels.Islands;
+using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
 
 namespace ClaudeDo.Worker.Tests.UiVm;
 
@@ -35,4 +37,59 @@ public class ParseDiffStatTests
         Assert.Equal(5, add);
         Assert.Equal(0, del);
     }
+
+    [Fact]
+    public void Deletions_Only_Returns_Zero_Insertions()
+    {
+        var (add, del) = DetailsIslandViewModel.ParseDiffStat("1 file changed, 4 deletions(-)");
+        Assert.Equal(0, add);
+        Assert.Equal(4, del);
+    }
+
+    // German-Windows git localizes "insertion(s)"/"deletion(s)" (e.g. "Einfügung(en)"/
+    // "Löschung(en)") but keeps the (+)/(-) suffix untranslated — the regex anchors on that.
+    [Fact]
+    public void German_Locale_Stat_Parses_Both()
+    {
+        var (add, del) = DetailsIslandViewModel.ParseDiffStat("2 Dateien geändert, 10 Einfügungen(+), 3 Löschungen(-)");
+        Assert.Equal(10, add);
+        Assert.Equal(3, del);
+    }
+
+    [Fact]
+    public void German_Locale_Insertions_Only_Returns_Zero_Deletions()
+    {
+        var (add, del) = DetailsIslandViewModel.ParseDiffStat("1 Datei geändert, 5 Einfügung(en)(+)");
+        Assert.Equal(5, add);
+        Assert.Equal(0, del);
+    }
+
+    // TaskRowViewModel used to run its own broken parser (expecting "+12"/"-3" tokens that
+    // `git diff --stat` never emits) — pin it to the same shared, correct parser as the detail badge.
+    [Fact]
+    public void TaskRowViewModel_UpdateFromEntity_Parses_Real_DiffStat_Format()
+    {
+        var task = new TaskEntity
+        {
+            Id = "t1",
+            ListId = "l1",
+            Title = "task",
+            CreatedAt = DateTime.UtcNow,
+            Status = TaskStatus.Done,
+            Worktree = new WorktreeEntity
+            {
+                TaskId = "t1",
+                Path = "/tmp/wt",
+                BranchName = "claudedo/t1",
+                BaseCommit = "abc",
+                DiffStat = "2 files changed, 10 insertions(+), 3 deletions(-)",
+                CreatedAt = DateTime.UtcNow,
+            },
+        };
+
+        var row = TaskRowViewModel.FromEntity(task);
+
+        Assert.Equal(10, row.DiffAdditions);
+        Assert.Equal(3, row.DiffDeletions);
+    }
 }