Coverage priorities 1-5: test pure functions, extract interfaces, mock-based handler tests

- Priority 1: Test NewSendEmailTask + NewSendPushTask (5 tests)
- Priority 2: Test customHTTPErrorHandler — all 15+ branches (21 tests)
- Priority 3: Extract Enqueuer interface + payload builders in worker pkg (5 tests)
- Priority 4: Extract ClassifyFile/ComputeRelPath in migrate-encrypt (6 tests)
- Priority 5: Define Handler interfaces, refactor to accept them, mock-based tests (14 tests)
- Fix .gitignore: /worker instead of worker to stop ignoring internal/worker/

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/middleware/logger_test.go

@@ -0,0 +1,103 @@
+package middleware
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/labstack/echo/v4"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/treytartt/honeydue-api/internal/models"
+)
+
+func TestStructuredLogger_Passes_Request(t *testing.T) {
+	mw := StructuredLogger()
+	e := echo.New()
+	handler := mw(func(c echo.Context) error {
+		return c.String(http.StatusOK, "ok")
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/api/test/", nil)
+	rec := httptest.NewRecorder()
+	c := e.NewContext(req, rec)
+
+	err := handler(c)
+	require.NoError(t, err)
+	assert.Equal(t, http.StatusOK, rec.Code)
+	assert.Equal(t, "ok", rec.Body.String())
+}
+
+func TestStructuredLogger_WithUser(t *testing.T) {
+	mw := StructuredLogger()
+	e := echo.New()
+
+	user := &models.User{Username: "loguser"}
+	user.ID = 42
+
+	handler := mw(func(c echo.Context) error {
+		return c.String(http.StatusOK, "ok")
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/api/test/", nil)
+	rec := httptest.NewRecorder()
+	c := e.NewContext(req, rec)
+	c.Set(AuthUserKey, user)
+
+	err := handler(c)
+	require.NoError(t, err)
+	assert.Equal(t, http.StatusOK, rec.Code)
+}
+
+func TestStructuredLogger_WithRequestID(t *testing.T) {
+	mw := StructuredLogger()
+	e := echo.New()
+
+	handler := mw(func(c echo.Context) error {
+		return c.String(http.StatusOK, "ok")
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/api/test/", nil)
+	rec := httptest.NewRecorder()
+	c := e.NewContext(req, rec)
+	c.Set(ContextKeyRequestID, "test-request-id-123")
+
+	err := handler(c)
+	require.NoError(t, err)
+	assert.Equal(t, http.StatusOK, rec.Code)
+}
+
+func TestStructuredLogger_ErrorStatus(t *testing.T) {
+	mw := StructuredLogger()
+	e := echo.New()
+
+	handler := mw(func(c echo.Context) error {
+		return c.String(http.StatusInternalServerError, "error")
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/api/test/", nil)
+	rec := httptest.NewRecorder()
+	c := e.NewContext(req, rec)
+
+	err := handler(c)
+	require.NoError(t, err)
+	assert.Equal(t, http.StatusInternalServerError, rec.Code)
+}
+
+func TestStructuredLogger_ClientError(t *testing.T) {
+	mw := StructuredLogger()
+	e := echo.New()
+
+	handler := mw(func(c echo.Context) error {
+		return c.String(http.StatusBadRequest, "bad request")
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/api/test/", nil)
+	rec := httptest.NewRecorder()
+	c := e.NewContext(req, rec)
+
+	err := handler(c)
+	require.NoError(t, err)
+	assert.Equal(t, http.StatusBadRequest, rec.Code)
+}