fix(stats/db.test): use rolling TODAY date to avoid stale 7-day window failures

Author: erudenko

plugins/stats/tests/db.test.ts

@@ -35,7 +35,9 @@ describe("db", () => {
     }
   });
 
-  function makeSession(id: string, project = "/test/project", date = "2026-03-26"): SessionMetrics {
+  const TODAY = new Date().toISOString().slice(0, 10);
+
+  function makeSession(id: string, project = "/test/project", date = TODAY): SessionMetrics {
     return {
       session_id: id,
       date,
@@ -48,14 +50,14 @@ describe("db", () => {
           duration_ms: 50,
           success: true,
           activity_category: "research",
-          timestamp: "2026-03-26T10:00:00.000Z",
+          timestamp: `${date}T10:00:00.000Z`,
         },
         {
           tool_name: "Write",
           duration_ms: 30,
           success: true,
           activity_category: "coding",
-          timestamp: "2026-03-26T10:01:00.000Z",
+          timestamp: `${date}T10:01:00.000Z`,
         },
       ],
       activity_counts: {
@@ -193,9 +195,8 @@ describe("db", () => {
 
   test("getSessionSummary returns aggregate stats", () => {
     const db = openDb(dbPath);
-    const today = new Date().toISOString().slice(0, 10);
-    insertSession(db, makeSession("s1", "/test/project", today));
-    insertSession(db, makeSession("s2", "/test/project", today));
+    insertSession(db, makeSession("s1", "/test/project", TODAY));
+    insertSession(db, makeSession("s2", "/test/project", TODAY));
 
     const summary = getSessionSummary(db, 7, "/test/project");
     expect(summary.session_count).toBe(2);
@@ -229,7 +230,7 @@ describe("db", () => {
     insertToolCalls(db, metrics.tool_calls, "old-session");
 
     // Insert a recent session
-    const recent = makeSession("recent-session", "/test/project", "2026-03-26");
+    const recent = makeSession("recent-session", "/test/project", TODAY);
     insertSession(db, recent);
 
     const { deletedCount } = deleteOldSessions(db, 90);