feat(ui): colonne tags de versions à gauche du graph Git — #193

frontend/src/features/git/GitGraphView.tsx

@@ -69,6 +69,8 @@ const LANE_W = 16;
 const ROW_H = 36;
 /** Radius of the commit dot. */
 const DOT_R = 4.5;
+/** Stable version tag column, kept outside the DAG lanes. */
+const TAGS_COL_W = 112;
 
 /** Horizontal centre of a lane. */
 const laneX = (lane: number) => lane * LANE_W + LANE_W / 2;
@@ -283,6 +285,8 @@ export function GitGraphView({ projectId }: GitGraphViewProps) {
           )}
           {vm.rows.map((row) => {
             const isSelected = row.commit.hash === selectedHash;
+            const tagRefs = row.commit.refs.filter(isTag);
+            const branchRefs = row.commit.refs.filter((ref) => !isTag(ref));
             return (
               <div
                 key={row.commit.hash}
@@ -297,21 +301,36 @@ export function GitGraphView({ projectId }: GitGraphViewProps) {
                 )}
                 style={{ height: ROW_H }}
               >
+                {/* Version tags live in their own stable column, left of the DAG. */}
+                <div
+                  data-testid={`git-tags-cell-${row.commit.hash.slice(0, 8)}`}
+                  className="flex shrink-0 items-center gap-1 overflow-hidden"
+                  style={{ width: TAGS_COL_W }}
+                >
+                  {tagRefs.map((ref) => (
+                    <span
+                      key={ref}
+                      title={ref}
+                      className="min-w-0 max-w-full truncate rounded bg-warning/20 px-1 py-0.5 text-xs font-medium text-warning"
+                    >
+                      {ref}
+                    </span>
+                  ))}
+                </div>
+
                 {/* SVG lanes + node */}
                 <GraphColumn row={row} laneCount={laneCount} />
 
-                {/* Ref badges */}
-                {row.commit.refs.length > 0 && (
-                  <div className="flex shrink-0 flex-wrap gap-1">
-                    {row.commit.refs.map((ref) => (
+                {/* Branch refs stay beside the graph in the existing refs zone. */}
+                {branchRefs.length > 0 && (
+                  <div
+                    data-testid={`git-branch-refs-cell-${row.commit.hash.slice(0, 8)}`}
+                    className="flex shrink-0 flex-wrap gap-1"
+                  >
+                    {branchRefs.map((ref) => (
                       <span
                         key={ref}
-                        className={cn(
-                          "rounded px-1 py-0.5 text-xs font-medium",
-                          isTag(ref)
-                            ? "bg-warning/20 text-warning"
-                            : "bg-primary/20 text-primary",
-                        )}
+                        className="rounded bg-primary/20 px-1 py-0.5 text-xs font-medium text-primary"
                       >
                         {ref}
                       </span>

frontend/src/features/git/gitGraphView.test.tsx

@@ -10,7 +10,7 @@
  * - Clicking close hides the detail panel.
  */
 
-import { describe, it, expect } from "vitest";
+import { describe, it, expect, vi } from "vitest";
 import { render, screen, waitFor, fireEvent } from "@testing-library/react";
 
 import { MockGitGateway } from "@/adapters/mock";
@@ -22,7 +22,7 @@ import { GitGraphView } from "./GitGraphView";
 // Helpers
 // ---------------------------------------------------------------------------
 
-function renderView(git: MockGitGateway = new MockGitGateway()) {
+function renderView(git: unknown = new MockGitGateway()) {
   const gateways = { git } as unknown as Gateways;
   return render(
     <DIProvider gateways={gateways}>
@@ -71,6 +71,10 @@ describe("GitGraphView", () => {
     expect(tagBadge).toBeTruthy();
     // Tag badge should have the warning colour class
     expect(tagBadge.className).toMatch(/warning/);
+    const tagCell = screen.getByTestId("git-tags-cell-aaaaaaaa");
+    expect(tagCell.textContent).toContain("tag: v1.0");
+    expect(tagCell.style.width).toBe("112px");
+    expect(tagBadge.className).toMatch(/truncate/);
   });
 
   it("shows 'feature' branch badge", async () => {
@@ -82,6 +86,29 @@ describe("GitGraphView", () => {
     expect(featureBadge.className).toMatch(/primary/);
   });
 
+  it("keeps tags in the left tag column and branches in the refs zone", async () => {
+    renderView({
+      graph: vi.fn(async () => [
+        {
+          hash: "1111111111111111111111111111111111111111",
+          summary: "Release build",
+          parents: [],
+          refs: ["main", "tag: v2026.08.14-long-release-name"],
+          author: "Alice",
+          timestamp: 1_717_200_000,
+        },
+      ]),
+    });
+    await waitForCommits();
+
+    const tagCell = screen.getByTestId("git-tags-cell-11111111");
+    const branchCell = screen.getByTestId("git-branch-refs-cell-11111111");
+    expect(tagCell.textContent).toContain("tag: v2026.08.14-long-release-name");
+    expect(tagCell.textContent).not.toContain("main");
+    expect(branchCell.textContent).toContain("main");
+    expect(branchCell.textContent).not.toContain("tag: v2026.08.14-long-release-name");
+  });
+
   it("clicking a commit row opens the detail panel", async () => {
     renderView();
     await waitForCommits();