Merge branch 'engine-precedence-fixes': OF/EF calendar+readings flawlessness pass

Per-day validation vs litcal (OF) and missalemeum (EF) 2005-2050, all defects
fixed and re-validated to zero: OF calendar 0 real errors forward, OF readings
0 unresolvable, EF 0 reading gaps + resumed Sundays correct.

1 files changed, 49 insertions, 0 deletions

diff --git a/internal/web/server_test.go b/internal/web/server_test.go
index 57286d5..42de0b5 100644
--- a/internal/web/server_test.go
+++ b/internal/web/server_test.go
@@ -630,3 +630,52 @@ func TestCalendarPDF(t *testing.T) {
 		t.Errorf("not a pdf (len=%d)", len(b))
 	}
 }
+
+// TestSourceOffer covers the AGPL-3.0 §13 obligation: a user interacting with
+// lectio-web over a network must be offered the corresponding source. That is
+// a licence term, not a feature, so it is pinned here -- if someone later
+// deletes the footer or the route, this fails rather than quietly putting the
+// operator out of compliance.
+func TestSourceOffer(t *testing.T) {
+	cfg := config.Default()
+	cfg.Offline = true // no network; the offer must not depend on readings
+	srv := NewServer(cfg)
+
+	t.Run("/source names the licence and where to get the code", func(t *testing.T) {
+		rec := httptest.NewRecorder()
+		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/source", nil))
+		if rec.Code != http.StatusOK {
+			t.Fatalf("status = %d, want 200", rec.Code)
+		}
+		if ct := rec.Header().Get("Content-Type"); !strings.HasPrefix(ct, "text/plain") {
+			t.Errorf("content-type = %q, want text/plain", ct)
+		}
+		body := rec.Body.String()
+		for _, want := range []string{config.SourceURL, config.License, config.Version} {
+			if !strings.Contains(body, want) {
+				t.Errorf("body missing %q:\n%s", want, body)
+			}
+		}
+	})
+
+	// Every page a user can actually land on carries the link. Fragments
+	// (htmx partials) are excluded -- they render inside a full page that
+	// already has it.
+	for _, path := range []string{
+		"/?date=2026-07-22&v=wuj",
+		"/reader?v=wuj&book=John&chapter=1",
+		"/settings",
+		"/bookmarks",
+	} {
+		t.Run("footer on "+path, func(t *testing.T) {
+			rec := httptest.NewRecorder()
+			srv.ServeHTTP(rec, httptest.NewRequest("GET", path, nil))
+			if rec.Code != http.StatusOK {
+				t.Fatalf("status = %d, want 200", rec.Code)
+			}
+			if !strings.Contains(rec.Body.String(), `href="/source"`) {
+				t.Errorf("page has no source link (AGPL §13):\n%s", rec.Body.String())
+			}
+		})
+	}
+}