Implement dashboard and audit log templates, add paginated audit log support

- Added `web/templates/{dashboard,audit,base,accounts,account_detail}.html` for a consistent UI.
- Implemented new audit log endpoint (`GET /v1/audit`) with filtering and pagination via `ListAuditEventsPaged`.
- Extended `AuditQueryParams`, added `AuditEventView` for joined actor/target usernames.
- Updated configuration (`goimports` preference), linting rules, and E2E tests.
- No logic changes to existing APIs.

internal/middleware/middleware_test.go

@@ -314,14 +314,14 @@ func TestExtractBearerToken(t *testing.T) {
 	tests := []struct {
 		name    string
 		header  string
-		wantErr bool
 		want    string
+		wantErr bool
 	}{
-		{"valid", "Bearer mytoken123", false, "mytoken123"},
-		{"missing header", "", true, ""},
-		{"no bearer prefix", "Token mytoken123", true, ""},
-		{"empty token", "Bearer ", true, ""},
-		{"case insensitive", "bearer mytoken123", false, "mytoken123"},
+		{"valid", "Bearer mytoken123", "mytoken123", false},
+		{"missing header", "", "", true},
+		{"no bearer prefix", "Token mytoken123", "", true},
+		{"empty token", "Bearer ", "", true},
+		{"case insensitive", "bearer mytoken123", "mytoken123", false},
 	}
 
 	for _, tc := range tests {