fix(maestro): fast-forward spawn prefers the focused session's project

N picked the globally freshest project by git-mtime, ignoring the session
the operator was actually on. Plain n's spawn form already seeds from the
focused session (spawnSimilarProjectSeed); fast-forward now matches that,
falling back to recency only when nothing is focused.

web/src/fastForward.test.ts

@@ -47,6 +47,30 @@ describe("resolveFastForward (#67)", () => {
     });
   });
 
+  it("prefers the focused session's project over the freshest one", () => {
+    const projects = [
+      project({ path: "/repos/fresh", name: "fresh", last_command: "claude" }),
+      project({
+        path: "/repos/current",
+        name: "current",
+        last_activity: "2020-01-01T00:00:00Z",
+        last_command: "zsh",
+      }),
+    ];
+    const res = resolveFastForward(projects, presets, "n", "/repos/current");
+    expect(res.project?.path).toBe("/repos/current");
+    expect(res.command).toBe("zsh");
+  });
+
+  it("falls back to the freshest project when the focused cwd is unknown", () => {
+    const projects = [
+      project({ path: "/repos/old", name: "old", last_activity: "2020-01-01T00:00:00Z" }),
+      project({ path: "/repos/fresh", name: "fresh" }),
+    ];
+    const res = resolveFastForward(projects, presets, "n", "/repos/gone");
+    expect(res.project?.path).toBe("/repos/fresh");
+  });
+
   it("falls back to the first non-custom preset when there is no last command", () => {
     const res = resolveFastForward([project({ last_command: undefined })], presets, "n");
     expect(res.command).toBe("claude");